Limiting links in signature to specific group?

[SoRnMaN]

Ok, I am in charge of modifying a vB forum and was wondering if there were any hacks for making it so only users in certain groups are allowed to have links in their signatures. I have searched through the forums here and at vbulletin.com and haven't been able to find one. Any help would be appreciated.

[Xenon]

SoRnMaN, to download hacks and get support you will need to go to this (http://www.vbulletin.com/members/forums.php) page and enter your email address, to show you are licensed. (you will need to use your customer number and password to access that page)
Thank you.