UPDATED: Track Down Purchases v5.1
This applet can examine the Music library and sort audio tracks purchased from iTunes into discrete playlists by either the purchaser's name or Apple ID (eg: "Purchased by Jane Smith" or "Purchased by janesmith@email.com") which in turn will be placed in a "Purchaser Playlists" playlist folder.
Latest version:
- Officially compiled as Universal
- Commensurate improvements for M1 Macs
- Fixes issue that may send extra track copies to results playlists
More information for Track Down Purchases v5.1 and download link is here.