Direct access to album containing files having the same tag.

[stefano_mbp]

the full genesis of using Grouping instead of Work is as follows:
iTunes used ContentGroup for alac files. At one point it was possible to choose between ContentGroup and Work, but Work also required to manage the Movement tag which was too complex.
Later I started using Audirvana which used ContentGroup for Alac files and Grouping for flac files.
I use Yate as a tag editor and a customization was available to meet the same criteria as Audirvana.
When I switched to Minimserver it was too late to change the tag used, editing about 180,000 tracks would have been a huge job