enhance it with parental controls and monitoring/access controls

Something missing from the suite is parental controls with monitoring and access control. A daily updated list of sites that your kids cannot access based on site ratings, and an ability to monitor your kids online would be good. Like a way to capture all chat logs, uploaded and downloaded pictures, Facebook stats, web cam screenshots. It can include internet usage time limits, p2p blocking, file sharing blocking and more.

I don’t think this is the type of thing CIS should do.

I agree that a full blown parental control application would be useful, but it should be a standalone application.

i think some protection at dns level can be provided
by filtering contents there only and password protecting setting

Yes HeffeD, standalone is the way to go with this kind of thing to be honest as it would cause too much bloat to CIS for this to be viable.