QUOTE(Blizzard Entertainment @ Starcraft Campaign Editor Help - "Doors and Turrets")
Turret Doodads can also be assigned to a player. To assign a turret to a player, select the turret and press the number key corresponding to a player. The turret will provide sight for the player and, if enabled, will attack the player’s enemies.
Right there in Staredit Help.

Panzer: What have you tried doing? If all else fails, do the "cloak a ling" trick with an arbiter
