KWinModule for several "kwin" processes

[Andriy Rysin]

Got a question which came from bug 107877 
<https://bugs.kde.org/show_bug.cgi?id=107877>
There's switching policies "per window" and "per application" for kxkb. 
It's implemented in a way that kxkb registers itself as a listener with 
KWinModule and gets notified when active window is changed. Now there's 
a case when user have multiple screens and don't use Xinerama he'll have 
several instances of kwin process running. kxkb currently registers 
itself only with 1st one, so whenever user switches to other screens 
kxkb never gets notified when active window is changed and thus "per 
window" and "per application" do not work. When user switches back to 
screen 0 everything is fine.
The question is whether there's a way to get hold of KWinModule for 
other screens to be able to listen to their messages?