Only the mouse port type is synchronized. You don’t (currently) see what the other player have inserted into the port. I know this is a weakness in the current design because you need to chat and agree on what you will insert in the ports (so you don’t use the same port). The plan is to extend the user interface later, so each player can also see the device the other players have chosen. But it should work just fine…:
Player one should have:
Mouse – Mouse (or Default (Mouse))
Mouse – No Host Device
And player two should have:
Mouse – No Host Device
Mouse – Mouse (or Default (Mouse))