User and guest links is it possible?

[TTT]

Ok i am not sure what some of you may call this or if it has even been integrated into vb yet, but here goes what I am looking for.

I have a site and we have alot of advertisers and what I am trying to do or find is best described below. any help would be greatly appreciated.

lets assume I have advertisers for selected keywords within my site and this would include all posts from admins to guests.

I will use the keyword Vbulletin for my examples

For all posts within my site that make reference to the term/word vbulletin I would like to be able to set a link to a site of my choice.

meaning that if a guest/member/admin comes to my forum and writes the following in either a reply or a new thread then what I would like to see happen is that where vbulletin is written that word would automatically be linked to whatever site I was affiliated with or the advertiser paid me for.

example Guest to my site writes:

I have just joined this great Vbulletin ( vbulletin is now a link to my advertiser site www.vbulletin.org) and I am looking forward to sharing my information and experiences with all of you here at www.siteuserisat.com and i have also noticed that this site uses vbulletin ( again Vbulletin keyword is automatically linked to destination of my choice)

I am assuming that something such as this already exists here but I cannot find anything nor do I know what it would be called.

Any help in the right direction is greatly appreciated