Hi, is it possible to restrict the ability to create items to some joomla usergroups?

I see the possibility to create K2 usergroups, but they don't seem to be related to joomla ACL

Also, I would like to display in frontend only items where the author is in a specific joomla usergroup

Thankyou Fotis, but how do I map K2 groups to Joomla usergroups?

Also, do you have any advice to make items hideden or unpublished based on the user group?

Fotis wrote: You map Joomla users to existing K2 User Groups. You do that "en masse" in the K2 Users list.

Sorry you mean that it can only be done manually? I have a community with over 4000 registered users, and new registering every day, it would be impossible to add them manually to the K2 group

Thanks, but the point is I can't just give permission to every new registered uses: not all the new registered users will have permission to add and edit new items.
I have different user types based on their subscription levels (= different joomla groups), and just the users in the "top level" group will be allowed to publish their items.

Going through K2 configuration into Settings > Permissions I see the possibility to assign permissions to Joomla Groups. The descriptions states " Default permissions used for all content in this component.
" but it don't seem to work for items.

Only if create a K2 group then I can manage frontend permissions, but then I have the problem to manually assign new registered from the right joomla group to the K2 group.

I still don't really get why K2 is not just using the standard joomla usergroups, instead of creating a new grouping system, but anyway... could you advice any solution to use joomla groups or automate adding only certain users to the right k2 group?