It should be possible. In normal HL, if you use the laser-guided rocket, and somebody else shoots a rocket, it will home towards your laser dot. I would assume that's the same basic function being used with controlling attacks in this game, sans the dot. So the second disk would be like the second rocket, homing towards the "dot" which is where your crosshair is aiming.
Should it be added though? I don't think so. It's bad enough that Frieza can return the disk to himself and keep reusing the instant-kill pizza.