KEYclone does not support mouse click passing... as of v1.8j....

that being said, you will never have a perfect click-able environment with today's mouse tech... in that i mean, your button down and drag cannot be replicated since windows needs to push focus to the other windows in order for them to process the mouse message. that being said, whenever multi-point mouse drivers become available, this may become a possibility.

even if it did... you would still have a problem with the orientation and position of your characters not being the same. this would make targeting not valid as the virtual world from each POV would be different

in the end, the solution will be mostly keyboard with a smattering of mouse clicks for static 'foreground' clickables (like action bars)