how to monitor the user connection

hi all is there a way to monitoring the user connection in other word i was useing ccproxy as a server before and there is “current connection information” to know which ip open what (http://www..) is this option found in mikrotik os in the queue list or what ever .as we close some sites for the students and soe how they founding a way to open it how can i know that.

Maybe http://wiki.mikrotik.com/wiki/CALEA is what you looking for.