event locations via “#_LATT {key} {option 1 | option 2 | etc.} ” filter

Hi there,
Since there are no categories at the event locations that I can filter in a shortcode, I have created a selectable attribute for it.
But I couldn’t find out how to filter a list of venues based on the value of the attribute.
[locations_list….?]
Could anybody give me some advice? Is that even possible or is there another way for a non-programmer?