a software to force my computers to use the net through my filtered router

Hi I would like to have a software that will force the computer to go to the net only through a certain router that has a filter on it, by constantly checking if the router is there otherwise it will lock down the internet. and it should work with all windows OS. it should be password protected to not be able to uninstall, or kill the process in task manager. "I affirm under penalty of perjury that the program I am requesting will not be used for any malicious purpose, such as logging users' keystrokes to steal/view users' passwords or other private information. Additionally, this software will be used legally on my company's networked computers to restrict my employee access to the internet."