With Tracks. Tracks use Tags to restrict visibility of the workout.
Ie. if you have a membership that's tagged, then everyone on that membership has that tag. To show this workout to just customers on that membership, click New Track, and add that tag to this track.
You can call this track whatever you want, and select whichever tag(s) should see the workout.
Remember to check that your tags are applied correctly to memberships or which ever customer list you have tagged.
#Workout Tracks
#Tracks