Hi – great question!
Yes, that’s possible, but you’re actually discussing a facet of how WordPress searches for posts rather than The Event Calendar itself. It would definitely be possible to do this and you would most likely go about it by filtering the where clause of the query put together by WordPress to conduct the search.
So that’s unfortunately a touch beyond what we can help you with here, but it is certainly achievable and I’d recommend reading through the relevant docs in the WordPress codex if you want to give this a shot. You may also find our own technical docs useful as a touchstone in the process.
Hope that helps!