Hi,
I am using the icon only taskmanager. unfortunately, I have some gtk applications (wx python apps) that are grouped together.

I tried using SetAppName, but that does not change anything

Does selecting "Allow this program to be grouped" not help?
(Can be found in 'More Actions' of that widget)

Thanks it did it. I noticed it was using groupingappidblacklist setting,

this would be fine if there was a global option disabling it for my usage.

There is groupingStrategy option available, but it has no effect on my kde version (Icon taskmanager).
It hides the "More Actions" menu