Tracking from who to accept movement requests? (MP, authoritative)

In need an authoritative server model for physics. ( rigidbodies have been going through each other )

After I instantiate on the server how can I track w$$anonymous$$ch client controls w$$anonymous$$ch character?

(Players are rigidbodies)

Normally I just disable input if networkview.ismine==false but when all rigidbodies, including players are owned by the server I cannot get the same effect.