Hello Konstantin,
What I originally wanted was for users to have control over the tasks, as it is sometimes necessary for the full scan to be aborted.
My conclusion is that all local tasks have to change manually one by one for every target.
My solution is the following. I created a central task for the required managed group and made it possible to "administer" central tasks for the end user. So they can start and stop the full scan and the other tasks if necessary. Finaly I denied the use of local tasks.
Thank you for support!
Best regards,
Kris