Does anybody know how to lock an application onto a particular KDE desktop?

I keep multiple KDE desktops open. This makes it easy to keep multiple programs running full screen. I can click on the desktop tab and instantly bring up the application I want. One of the desktops is for my web browser (Firefox), and another is for my eMail client (KMail).

However, whenever I click on a link address in an eMail, the browser jumps from it's own desktop into the desktop where I am running KMail. I'd like to keep Firefox in it's own darn desktop, but can't find a setting to prevent it from moving.

Anybody know how to do this? TIA.

Check your option in the menu you get when you left click the top left hand corner icon of the window decoration. See if you can set the Only on this Workspace choice. If there is no top left icon right click in that same location.