Note: I'm assuming you're using something like a menu ring control. Yes, it's possible, though I would suggest using the Disabled Items property. It's easier to use that property than fiddling around with deleting elements from an array. For each control all that you would need to do is build an array from the current values for each of the other controls that you have, and wire this array to the Disabled Items property. This will effectively disable all items that have been selected in other controls.
There is one flaw with the premise though: What if you have a value selected for each control? At that point there would be no way to change the value for any of them since all of the available choices would be disabled. Thus, you would need some sort of "Reset" button.
