How do I set Multiplayer individual instances?

It sound so simple but i'm having issues with this. The host clicks the mouse and both the host and the peer fire the same weapon.

I want the peer and host to fire separate like a normal multiplayer game would allow.

What is the code to make a peer do something on their own instance like shooting a weapon or using an ability?

Ive messed around with peer=multiplayer.id and not = but im missing the basic logical statement here. Any help is much appreciated!

um, you need read the tutorial again, peer dont actually do anything by itself, peer only pretend he is doing something in its own screen and tells host what he want to do, then host do for peer.