Remove commandibility but not controll.

[Sir.Wazzel]

I'm currently working on my first real map. In my map players will summon units that will be sent off to other peoples bases. But my problem is, once the units are summoned players can still select their units and divert them from the original path. I've seen my problem fixed in "Castle Fight" so I know it's possible. How do I remove the ability to command a unit without switching player control? For now I've made a trigger that will deselect the unit and then send it back to it's owners starting area. But it doesn't change the fact that people can interfere with the units. Please help, I've been racking my brain for way to long on this one.


Thanks in advance.