As far as I know, a cable clamp is as close as you can get to a releasable cable tie. Most cable ties I see are bitches to undo. Bear in mind you want to make quick release a high priority when it comes to constricting your unit.
The other factor you have to take into account is that regular cable ties are very thin and will serve to cut into the skin, making it harder still to release or control pressure. Cable clamps are preferable as they are solid and chunky enough not to embed themselves uncomfortably in your shaft skin. They are also robust enough to handle sizeable pressure.
They also apply force in two directions particularly, avoiding the underside (CS) of the penis.