How can I send an RPC call to a specific player? On collision I want to send the call to that specific player that was collided with, any ideas? Please?
You might wanna look into:
OnTriggerEnter
OnTriggerExit
OnTriggerStay
OnCollisionEnter
OnCollisionExit
OnCollisionStay
http://docs.unity3d.com/Documentation/ScriptReference/Collider.html
Collider events have nothing explicitly to do with Multiplayer.
There is an overload of Network.RPC that takes a NetworkPlayer object. If the colliding object has a NetworkView you can get the owner of that NetworkView with NetworkView.owner.