You have to know a bit of C (if u wanna learn) ;)

Forum: The Linux Kernel Hackers' Guide
Re: How can I "cheat" and change the IP address (src,dest) in the sent socket? (Rami)
Re: Untitled
Date: Thu, 15 Jan 1998 00:12:45 GMT
From: Lorenzo Cavallaro <lc529863@silab.dsi.unimi.it>

Yo, You have either to write your own client IRC, or to modify the source Code one of the most famous client IRC: ircII (I dunno the actual release ... maybe 2.9.x). If u dont have ircII, well it's not hard to find it on the Net ... For further info, check out www.2600.com and look for the FAQ (even old ones) Bye