Hi guys!
Unfortunately, Pixel Streaming with a single instance isn’t designed to work with proper multiplayer, this is due to restrictions on how the input is handled.
To elaborate, it’s possible to have users connected and with their own camera, but input won’t allow you to uniquely control your own character.
However, if you were wanting multiplayer whilst utilizing Pixel Streaming, the best means would be to run a basic multiplayer dedicated server and stream the client games to each player accordingly. That way each player gets their own instance/game, but are connected together via the dedicated server.