I have played a few.
A
very rough guide:
One person is the ref/gm and has a map of the table - some just use hex sheets with symbols on it, and others take photos of an actual table that has been set up with scenery.
Players are given units and let the ref know where they are set up.
The set up map is sent to each player and orders are given, which is sent to the ref.
The ref either makes the dice rolls, or an online web dice roller is used.
The ref then lets the players know of the results for the turn and so on.
I am thinking of doing one for Strange Aeons to be played via the LAF forum, but that is a secret