if you use dchp to get your ip info, you can make a simple batch script scheduled to run after what time you need like this:
this will stop your computer from gaining access to the internet.
The next step would be to create another batch file and schedule it to run at 2:00 like so:
That would renew your ip address and allow you to access the internet during the "free time". Schedule the first batch file I showed at the time the free access ends.