LL::NG rely on a session mechanism with the session ID as a shared secret between the user (in SSO cookie) and the session database.
To configure sessions, go in Manager, General Parameters ยป Sessions:
llngDeleteSession. To use it, simply give it the user identifier (wildcard are authorizated):# Delete all sessions opened by user "dwho" $ llngDeleteSession dwho # Delete all sessions opened by user starting with "dh" $ llngDeleteSession dh* # Delete all sessions: $ llngDeleteSession *