On the Posts page (“All Posts” menu) you find a filter above the list that filters the posts by tag groups. If the filter is active, only posts are displayed that have at least one tag that belongs to the selected tag group.
Restrictions: The filter does not work for multiple taxonomies in the same post type1 and not for “category”2.
Footnotes
- because the standard WP query would connect them with the condition “AND”[↩]
- because it interferes with the category pull down menu[↩]