how can i block chat using Thomson TG585 v7

ihave modem Thomson TG585 v7, i want to control accessing the internet, for example:
in my home i need to set the time for my kids to access the internet from 4:00 to 8:00
and at the same time chat web based program that use Java (i think Java) like:

i know there is aprogram that control these points i menisined
and i use:

and it helped me blocking web sites, but not all like online chat

also the program i am using when stop the internet, it stops all websites but not the chat like if the window still open.

Thanks in advance
Who is Participating?
Istvan KalmarConnect With a Mentor Head of IT Security Division Commented:
MadkhaliAuthor Commented:
Thanks, i will try it :)
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