I want to have two DEs: Xfce & KDE. The Xfce I want to use as a dark theme, because it has the darkest theme I’ve found, which I couldn’t find anything equal on KDE. However in KDE I have Latte, and when I initialize Xfce, Latte does as well, breaking the workflow of the interface.

Is there how to “Autostart only if KDE is running?”