I realize what your problem is, but what are you trying to solve? There is most likely a better way to do whatever you are trying to do.
If you really really want to do it this way though, you can create a command, within the command set a global variable for the player to 1 or 0 (depending on what it already is), then within the prethink, if the global for the player is set to 1 ignore it. You would then also have to add the command before and after your gRadioCommands.