Scheduling a block of just one site?
Let's start with the COMMANDS to control the Windows 7 firewall. This is documented at
OK, now we have control over the firewall. Now you can add TWO COMMANDs to run via the Windows Scheduler. The first command is to disable that address and the second is to enable it.
So it appears that you can indeed create your own solution.
I'm looking for a program to grant Internet access to a specified program for certain hours, for example to use a web browser only between 9-11 pm