In previous versions it was possible to assign a template to a user and give the user only acces to a specific region by checking out the ‘cascade permissions’. This setting is nog available anymore.
Is there a way to assign a template to a user and only allow edit-permissions to some regions?
When a User creates a Layout they own it and so they automatically have access to everything, including the Template they have chosen to start creating the Layout.
You could give View/Edit/Delete access to the actual Layout and then specify which sections of the Layout they should be interacting with using these options.
Folders are a great way to share user items with multiple users but if you want to restrict interaction with Regions these have to be applied on the Layout itself.