I think there is a misunderstanding here since pixel streaming is basically remote rendering of your client on a server, be it in the local network or in the cloud. So that has nothing to do with multiplayer capabilities.
To host multiplayer servers you can use GameLift or AWS EC2 (which is cheaper than GameLift but you have to do more manual setup) or any other hosting service. If I understand your question correctly, Pixel Streaming will not help to solve your problem.