I don't quite understand. Please try rephrasing.
Also, if you can support the above with screenshots, that would help a deal.
I'll try!!!
When you insert the song in the artist --> multiartist field you can also insert all the members who performed the song.
Example:
Abba (artist group)
The King Has Lost His Crown (song)
To be included in the multi artist
Arranged By [Strings] – Anders Eljas
Bass – Rutger Gunnarsson
Drums – Rolf Alex
Guitar – Lasse Wellander
Lead Vocals – Frida
Oboe – Jan Risberg
I would like instrumental performers not to appear in the artist list
As you can see in the images, the drummer and all the other performers of the song appear in the list of artists, thus creating multitudes of artists who perhaps only made the arrangement of that song.
But only those whose role is only artist or interpreter would appear.
It is very useful as information but should only appear as track info in the appropriate panel.
I hope I've been exhaustive.