http://paragonwiki.com/wiki/Chan_use...ash_Command%29
/chan_user_mode channel global options
So... say you wanted to demote a friend with the global name of @UltraBob from the global channel Bobs of CoH, I think you would type the following into your chat box.
/chan_user_mode "Bobs of CoH" UltraBob -operator
See if that does what you're looking to do.
Edit: Put quotes around the channel name because it contains spaces.
Take away a star in a global channel??? Like the command for it in simple English cause the text in CoH doesn't do anything and the text on paragon wiki isn't any better???