User group plugins working with events manager

Hi dear em-support,
i’m already using em and em pro for several sites.

Now a new project request requires events organized by teams.

My basic question for it is, if there is a (tested) user group plugin which is know for working with event manager?

Sample plugins:
* good one: https://de.wordpress.org/plugins/wp-user-groups/
* would prob. not fullfill team requirement: https://de.wordpress.org/plugins/user-groups/advanced/
* BuddyPress-Groups maybe could work??
* i already user “user role editor” in one of the installation, which fits for it and works absolutely transparent with em / em pro (great job!!); this solution lacks of groups, since user role editor can only differ beween “own” and “others” events, categories, …

The requirement are:
– events, eventlocations and -categories are visible per group
– a group consits of members and one manager
– members should be able ONLY to see, edit, manage bookings for their own events, locations, …
– manager should able to see, edit, manage bookings for all events, locations, … of his group, but not these of other groups.

=> Please share any experience if an existing solution is already available;
=> Otherwise, can you think of an way to achive this requirements?

Thank you very much / best christmas-wishes!

Thomas