First you need to find your Apple TV's MAC Address. Use these instructions to find your devices MAC Address
Turn the Apple TV on
Go to the main menu and select “Settings”
In the settings select “About”
Find the Ethernet ID label, this is your MAC Address. It will be 12 characters long, for example: 001A2B3C4D5E
Keep this screen up or Write the MAC Address down.
Go to your computer, which must be connected to the apartment’s internet connection, and open up a browser i.e. Firefox, Safari, Chrome, and go to the webpage usage.kempertc.comPlease Type This In Exactly How It’s Shown.
On the webpage you will see Enter device’s MAC Address. Enter the MAC address of your Apple TV there.
When entering the MAC Address, YOU MUST PUT A COLON : EVERY 2 CHARACTERS. For example: 00:1A:2B:3C:4D:5E The colon key is Shift+Semicolon, the key to the right of L on your keyboard.