The answer is 'yes' but I need to get a bit tech here.
The BCF has faders and therefore it is likely it uses a analog to digital converter (ADC).
So Behringer used one of the jacks as a controller connection for use with a expression pedal and the other is just a switch.
Although I haven't used it on my BCF it is likely the controller jack is a TRS with a voltage between the either the tip and sleeve or the ring and sleeve .
I'll assume the tip is the + voltage and the sleeve is the input the ADC sees, but you should check with a meter.
Tip -------+-------------o------|
Ring (in)---------------o<----| Pedal (Pot)
Sleeve (ground)-----o------|
The Input wants a voltage between 0 and the Tip voltage.
If you connect the input to the tip you will get max value.
If you connect the input to the sleeve you will get min value.
So it can act as a switch.
So to get the controller to act as a simple switch input you need a resistor (around 10k ohm but as I don't have the circuit diagram you might have to play around a bit with the value) to pull the input value to 0 volts when the switch is open (not connected)
Tip -------+-------------o-----|<-- Switch Tip
Ring (in)---------------o-----|<-- Switch sleeve -----|
Sleeve (ground)-----o-----|< --------- Resistor ----|
Hope this makes sense.
Connecting the sleeve and the ring together without a resistor and then switching to the tip in could be a disaster as it would be connecting the voltage straight to ground..!!!!
Anyone who has done this or knows any more info about this port might like to chime in here before I embarrass myself too much.
All the best
Royce