From what I understand of Blizzard's implementation of the [modifier=$key] macro option, it only operates on a mouse click, so the bar mod you have doesn't have anything to do with it.
I'm not familiar enough with Blizzard's new macro implementation to tell you if a mod could be written to make it apply to keystrokes, as well, but from my casual observation, I suspect that such a change would have to be made by Blizzard.
I could be wrong, however, and if anyone knows otherwise, please fill us in.
