Tag with mutiple-values

Hello masters,

I have maintained multiple value tags through Extended Tags option and Tag Panel, e.g. Artist: Mark Knopfler (1st Artist), Emmylou Harris (2nd Artist).
Is there any dynamic way to access 2nd/3rd/etc value of tag when formatting/editing?
If I want to assign 2nd value of Artist to a column or to filename or maybe in the export file would this be possible?

Is there any standard ID3v2.4 tag to enter featured artists?

Thank you,

It should be possible with the next version.