Yes, this is 1:1 connection, means you can have bound only one controller to the copter (as well as only one copter to the controller).
If you change, you have to bind again, either wizard or ST16.
Don't forget to bind the ST16 to your bird again if you have used the wizard before. Since the feature "Dual Band Control Redundancy" is in, you can control the copter via WLAN without having the 2.4GHz connection. Due to WLAN latency there may appear strange behaviour during the flight and landing may be hard to control. Some people lost props because of this...
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