Hi
As far as I see from the patch file itself, that tool requires 3 netfilter files in the kernel to be modified (ip_tables.h, netlink.h and ip_tables.c) and thus is not just an additional kernel module. From that I don't see how an Fedora Extras package should handle this, unless Dave Jones accepts to integrate the modified netfilter code for the Fedora Core kernel.
Thats very unlikely to happen. I assumed it was a standalone package. regards Rahul