XT				COMMENT				NEED WORK
net/netfilter/xt_addrtype.c	- needs native interface	*
net/netfilter/xt_AUDIT.c	- into nft_log?	logging flavour	*
net/netfilter/xt_bpf.c		- needs native interface	*
net/netfilter/xt_CHECKSUM.c	- add nft_mangle		*
net/netfilter/xt_CLASSIFY.c	- add nft_mangle		*
net/netfilter/xt_cluster.c	- needs native interface	*
net/netfilter/xt_comment.c	- native support in nft
net/netfilter/xt_connbytes.c	- needs native interface	*
net/netfilter/xt_connlabel.c	- needs native interface	*
net/netfilter/xt_connlimit.c	- needs native interface	*
net/netfilter/xt_connmark.c	- nft_meta
net/netfilter/xt_CONNSECMARK.c	- nft_meta			*
net/netfilter/xt_conntrack.c	- nft_ct
net/netfilter/xt_cpu.c		- nft_meta (needs easy change)	*
net/netfilter/xt_CT.c		- nft_meta_target		*
net/netfilter/xt_dccp.c		- nft_payload + nft_cmp
net/netfilter/xt_devgroup.c	- nft_meta (needs easy change)	*
net/netfilter/xt_dscp.c		- nft_payload + nft_cmp
net/netfilter/xt_DSCP.c		- add nft_mangle		*
net/netfilter/xt_ecn.c		- nft_payload + nft_cmp
net/netfilter/xt_esp.c		- nft_payload + nft_cmp
net/netfilter/xt_hashlimit.c	- needs native interface	*
net/netfilter/xt_helper.c	- nft_meta + nft_cmp
net/netfilter/xt_hl.c		- nft_payload + nft_cmp
net/netfilter/xt_HL.c		- add nft_mangle		*
net/netfilter/xt_HMARK.c	- needs native interface	*
net/netfilter/xt_IDLETIMER.c	- needs native interface	*
net/netfilter/xt_iprange.c	- nft_payload + nft_cmp		* [ --ports ]
net/netfilter/xt_ipvs.c		- needs native interface	*
net/netfilter/xt_LED.c		- needs native (need this?)	*
net/netfilter/xt_length.c	- nft_meta + nft_cmp
net/netfilter/xt_limit.c	- nft_limit
net/netfilter/xt_LOG.c		- nft_log
net/netfilter/xt_mac.c		- nft_payload + nft_cmp
net/netfilter/xt_mark.c		- nft_meta
net/netfilter/xt_multiport.c	- nft_payload + nft_cmp
net/netfilter/xt_nat.c		- nft_nat
net/netfilter/xt_NETMAP.c	- nft_nat
net/netfilter/xt_nfacct.c	- needs native interface	*
net/netfilter/xt_NFLOG.c	- needs native interface	*
net/netfilter/xt_NFQUEUE.c	- nft_queue
net/netfilter/xt_osf.c		- needs native interface	*
net/netfilter/xt_owner.c	- nft_meta + nft_cmp
net/netfilter/xt_physdev.c	- nft_meta			*
net/netfilter/xt_pkttype.c	- nft_meta
net/netfilter/xt_policy.c	- needs native interface	*
net/netfilter/xt_quota.c	- integrate nfacct into nft?	*
net/netfilter/xt_rateest.c	- needs native interface	*
net/netfilter/xt_RATEEST.c	- needs native interface	*
net/netfilter/xt_realm.c	- nft_meta (needs easy change)	*
net/netfilter/xt_recent.c	- needs native interface	*
net/netfilter/xt_REDIRECT.c	- nft_nat			*
net/netfilter/xt_sctp.c		- nft_payload + nft_cmp
net/netfilter/xt_SECMARK.c	- nft_meta_target		*
net/netfilter/xt_set.c		- integrate ipset?		*
net/netfilter/xt_socket.c	- needs native interface	*
net/netfilter/xt_state.c	- nft_ct
net/netfilter/xt_statistic.c	- needs native interface	*
net/netfilter/xt_string.c	- needs native interface	*
net/netfilter/xt_tcpmss.c	- needs native interface	*
net/netfilter/xt_TCPMSS.c	- needs native interface	*
net/netfilter/xt_TCPOPTSTRIP.c	- needs native interface	*
net/netfilter/xt_tcpudp.c	- nft_payload
net/netfilter/xt_TEE.c		- needs native interface	*
net/netfilter/xt_time.c		- needs native interface	*
net/netfilter/xt_TPROXY.c	- needs native interface	*
net/netfilter/xt_TRACE.c	- nft_meta_target
net/netfilter/xt_u32.c		- nft_payload (raw expressions)

IPV4
net/ipv4/netfilter/ipt_ah.c		- nft_payload + nft_cmp
net/ipv4/netfilter/ipt_CLUSTERIP.c	- deprecated
net/ipv4/netfilter/ipt_ECN.c		- nft_mangle			*
net/ipv4/netfilter/ipt_MASQUERADE.c	- nft_nat (easy change)		*
net/ipv4/netfilter/ipt_REJECT.c		- nft_meta_target		*
net/ipv4/netfilter/ipt_rpfilter.c	- needs native interface	*
net/ipv4/netfilter/ipt_ULOG.c		- deprecated

IPV6
net/ipv6/netfilter/ip6t_ah.c		- nft_payload + nft_cmp
net/ipv6/netfilter/ip6t_eui64.c		- nft_payload + nft_cmp
net/ipv6/netfilter/ip6t_frag.c		- nft_exthdr + nft_cmp
net/ipv6/netfilter/ip6t_hbh.c		- nft_exthdr + nft_cmp
net/ipv6/netfilter/ip6t_ipv6header.c	- nft_exthdr + nft_cmp
net/ipv6/netfilter/ip6t_MASQUERADE.c	- nft_nat (easy change)		*
net/ipv6/netfilter/ip6t_mh.c		- nft_exthdr + nft_cmp
net/ipv6/netfilter/ip6t_NPT.c		- needs native interface	*
net/ipv6/netfilter/ip6t_REJECT.c	- nft_meta_target		*
net/ipv6/netfilter/ip6t_rpfilter.c	- needs native interface	*
net/ipv6/netfilter/ip6t_rt.c		- nft_exthdr + nft_cmp

NOTE:
~ 50% features missing in nftables with regards to nftables.

-- 17/June/2014