Hi Albert,
Thanks for your interest in The Events Calendar and Events Calendar PRO!
There is not a built in way to make this kind of two-tiered event. You can make Private events. We do have a basic tutorial that can help you get started with roles and permissions.
Some of our customers have customized the plugins to do some more complex things with permissions and private events. It’s entirely possible that you could build something like what you’re looking for. However, please note that this kind of complex customization is beyond our capacity to support, so you’d need to work out the details yourself.
Best,
Leah