From Child Controls:
Automated Porn Eliminator is the parental control software which blocks pornographic content in peer-to-peer programs (imesh and morpheus currently supported). APE also blocks adult content in most browsers. Features include password protection at different levels, encryption, automatic computer shutdown between certain times, file locking to prevent tampering, user edited content and URL word lists, logging of attempts to view adult content and a host of other useful features. This porn blocker also has an application access feature, which allows parents to restrict kid's use of any particular installed program. APE also enables parents to monitor their child's usage and change settings completely online.