Good evening Arne and welcome to the Events Calendar forum!
Thank you for your interest in our products.
We’ll be glad to answer your questions.
The short answer is that you can “fake it”: https://theeventscalendar.com/knowledgebase/can-you-have-multiple-calendars/
As an alternative, you could use the newest member of our family, Loxi: https://loxi.io/
It is not exactly the same as the Events Calendar, for the purpose of having multiple calendars that really look and feel separate, it is probably more efficient.
Let me know if that helps.
Have a great day!
Geoff B.