Which artist does Roon use for search and in "My Library"

I would like to know which artist metadata Roon uses for search and the in “My Library” list. I am not interested if an artist XY plays alone, with a trio or a quartet. Right now these constellations determine a search and also whether an album is listed in “My Library” or not. Where can I determine the search criterion to use either “Album Artist” or “Artist”. If this is not yet possible I’d appreciate very much such an option.