Internet Explorer BLocker

Intranet user given users access to Internet usage. Control of proxy is controlled by an entity that our side can not control. Would like a software that hides in the background unknown to users...Each time someone tries to search up a word "SEX", "PORNO", "MP3" or words administered by us...via Internet explorer, the IE will log down entry and log out the user to the site...similar to Internet Child lock. Not sure how it will cost, but would like Admin functions, and easy install.. DESKTOPs = XPs and NTs ## Deliverables Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. Complete copyrights to all work purchased. ## Platform NT and XP desktops, ## Deadline information runs behind background of at least IE 5.0+ if possible.