Martin,
Thanks for getting in touch! You should be able to install a role/capability management plugin (my personal favorite is this one). Once you’ve installed that, you’ll see capabilities that are specific to The Events Calendar that will allow you to customize permissions for specific user roles. You’ll notice in this screenshot, I’ve highlighted a few of the capabilities that are available for you to use.
I suggest you play around with some of those capability options and customize the permissions to suit your specific needs, and then let me know if you have further questions.
Thanks! π
-Casey-