Is there a way to send an intent via one of the TC51 buttons from a locked TC51?

I have a customer that on the TC51 M wants to be able to press the back button to enable an intent. Works fine when the devices is on and unlocked, but they would like this to work even if device is suspended. Understand we can set Wakeup source as one of the buttons, but can the intent be sent if the screen is locked via PIN or would it have to be unlocked first?