The answer is yes... however...
You can't do it from the turret behavior events and actions themselves that I have found.
The closest I have gotten to smart targeting specific objects (that aren't simply nearest or of sprite type) is by using the turret action to target specific "family".
You will have to "pick" your target using some other method and then store it and its x,y to a variable though. The turret behavior itself doesn't have the ability that I have found.