General :: Can Android Modifier Key Fallback On Action?

I'm working on an input device that has a button that I'd like to act both as a home button when pressed by itself, but also work as a modifier for the other buttons on the device. I know you can do this in the kcm file with other buttons, and have something like:

Code:
key ESCAPE {
base: fallback BACK
alt, meta: fallback HOME
ctrl: fallback MENU
}

Is it possible to have something like:

Code:
key CTRL_LEFT {
base: fallback HOME
{SOMETHING HERE}: CTRL_LEFT
}

So that I can press that button with another button and have it not fallback on HOME?