This returns true if this object is the authoritative version of the object in the distributed network application.
This value is determined at runtime, as opposed to LocalPlayerAuthority which is set on the prefab. For most objects, authority is held by the server / host. For objects with LocalPlayerAuthority set, authority is held by the client of that player.
For objects that had their authority set by AssignClientAuthority on the server, this will be true on the client that owns the object. NOT on other clients.