By recordings do you mean studio versions or live (bootleg) recordings?
Anyway these are the versions that have been released (with sources): Common People (album version) - Different Class and Common People (single) Common People (7" edit) - Common People (single) Common People (live at Glastonbury) - Mis-shapes / Sorted For E's & Wizz (single)
Remixes: Common People (Motiv 8 Club Mix) - Common People (single) (22 May 1995) Common People (Vocoda Mix) - Common People (single) (22 May 1995) Common People (Doggy Disco Mix) - (German 12" promo single) Common People (TTP Understand the Acid Mix) - Common People (German 12" promo single)
And obviously many live recordings exist. Far too many to easily list (I've got at least 50).