How to make a collidable brick that is NOT anchored but cannot be pushed?

Hello.

I am making a physics-based game about trains. Since it's physics-based, it needs to have REAL wheels. Since it has real wheels, we need to set the physics ownership to the driver, so it doesn't glitch. Since we need to set the physics ownership to the driver, other players can derail the train by pushing it.

PS: i had no idea how to end my post so i put PS