limit offered albums by a tag..?

[el.patron]

I gave it a try, but it only works partially as expected, or I got from your description. I added the "Person" tag to my files.
- one part got the value "John"
- the rest got "John, Martin"

When rescanning and restarting the minimserver, I get the Person choice with exactly this two entries. What I would prefer are the two choices "John" and "Martin" separtely.
When choosing "John", I would want to get the files offered with the tag values "John", but also "John, Martin".
Choosing "Martin", then the files with the tag value "John, Martin" shoud be offered.

Is there a way to get there..?

Thank you!