i3 and rdesktop -- who gets the meta?

I am using i3 desktop manager bound to my Win (or meta) key. Everything works great. Sometimes, I like to rdesktop into my windows machines. Now, as long as the application window is focuses or fullscreen, my windows machines gets the Win keys. If I want send commands to i3, I'll have to exit full screen and focus on a different application. The transition is slightly awkward. If I want to override the behavior I can invoke rdesktop -k. Now i3 listens to my windows keys. But, now windows can't hear my windows key. Now are windows shortcuts are disabled. Bummer. Is there a way to get selectively send calls to windows/i3? Binding to alt doesn't solve the problem.