Hi Steve, hope you’re having a great day so far!
Yes, that is indeed possible and it is a feature of Events Calendar PRO. With Events Calendar PRO installed and activated, it will enable additional features in the Events List widget that allow you to filter events in the widget by specific options, including categories.
Here’s a rundown of all the options and a side-by-side comparison of the widgets:
https://theeventscalendar.com/knowledgebase/configuring-the-list-widget/
Does this help answer your question? Please let me know. 🙂
Cheers!
Geoff