Hi there! I'm sorry, but the game is currently local multiplayer only, so both players will have to play on the same PC (one player in VR, and the other at the monitor). While we would obviously love to have it, we can't promise anything in terms of future online multiplayer support.
It is't super fast so maybe you could try teamviewer so you could be in vr and the other person could controll your computer from his computer. hope this helpes :D
There is apparently a service called "Parsec", which is basically like TeamViewer, but specifically designed for playing local multiplayer games remotely. We haven't tried this for ourselves yet, but it could be an option?