In Windows, you can use AutoHotKey to make Capslock a standalone key (say, binding it to 'escape') as well as a modifier (so that you can bind, say 'CapsLock + k', to launch a browser).
I've tried everything under sun to make CapsLock have its own special binding PLUS make it a modifier key in Ubuntu and Xubuntu, and tried various Autokey python scripts, but it seems this is not possible on Ubuntu/Xubuntu?
Am I wrong? Does anyone know a way this could be possible?