Yes you can shut the DRL off with the Procal. The DRL option on the Procal are as follows, low beams, high beams, turn signals, fog lamps, European (whatever that is) or off.
I had mine set on the turn signal for my DRL fo 3 years without any issues from the police what so ever, I only now have it back to regular DRL as I had my Jeep in for warranty work and they flashed my computer which turned my tpms and regular DRL's back on. I have since turned my tpms off and calculated for my tires size again, but for now for a change I've left the DRL's to their default position.
I'm in Ontario, Canada by the way.