Thank's a lot Geraint.
"JEvents inherits SOME (generic) settings and has its own e.g. for editing own events."
-My original errind was whether I can maintain all permissions in Joomla's ACL, and then they will propagate to JEvents, so that if I e.g. after 1 year, decide that worker shall not any more be allowed to edit Articles/events etc. and if I change this groups permissions in Joomla's ACL, then these settings will also be automatically changed in JEvent's ACL (the screendumps).
You mention SOME, -I am just interrested in the Group Permissions.
If I have to administer JEvents permissions separately, I might as well go for "Authorised User Mode", or find another product that does what I would like