API to query all sessions for a user

[johnlister]

I would like a means of terminating multiple sessions associated with a user and trigger back channel logout. I can see the revoke endpoint can terminate an individual session or all the sessions for a user - the latter doesn't invoke BCL.. Is there any way of querying the sessions for a user(subject) in order to call the revoke endpoint for the each appropriate session.
I have a requirement to interface to a smartcard on the users device which may be tied to multiple sessions and I need to terminate them on removal of the card.