You *might* be able to set up a keymap (assuming you are using Keyclone) and set Q and A to do nothing for your main, but pass strafe to the slaves.
You'd have to set up a macro for each one too I think. I just started working with keymaps last night, so I'm not the one to ask how it's done. :P

It was the Focusless, Leaderless etc etc thread.
Here's a link to it in the General forum.