You mean in addition to holding ctrl+cmd, correct?
You can achieve this using the "normal mouse" section in BTT. You need to configure two left-click triggers that use the modifiers you want. The first must be set to trigger on mouse down, the second must be set to trigger on mouse up. Assign the predefined action "Start Moving" to the first and the predefined action "Stop Moving" to the second.
Here is an example:
click_move.bttpreset (2.0 KB)
