this currently works only against 2.6.2_rc2-love2 (or you can patch the kernel by hand with the kernel patch available at http://l7-filter.sourceforge.net/ ).
Created attachment 24590 [details] the ebuild (goes to /usr/local/portage/net-firewall/iptables/ )
Created attachment 24591 [details] the l7 iptables patch (goes to /usr/local/portage/net-firewall/iptables/files/)
this ebuild is provided by Irrumator from #love-sources.
Added to 1.2.9-r1
i'm willing to maintain this ebuild.