If you have a Kick Off Pass you can have more than one device logged in to your WatchLOI account at any one time but you must access different games on each device

You can't watch the same game simultaneously on different devices or on different browser tabs on the same device.

You can, however, watch separate games at the same time on different devices/browser tabs under the same subscription. 

If you attempt to open a game you are already watching on another device or tab, the below message will appear on screen: