Hello
We have a problem with session control. When  anybody try to use current sessions  they all have been showing to him as "him_name"@session_number 

and hi can do anything with it despite his authentication.

Every user can  run xwininfo and see all sessions as his own sessions.

eugeny@pcdir-mint13 ~ $ x2golistdesktops 

No protocol specified

xwininfo: error: unable to open display ":0"

No protocol specified

xwininfo: error: unable to open display ":0"

eugeny@:51

eugeny@:50

eugeny@pcdir-mint13 ~ $ su tunki

Password: 

tunki@pcdir-mint13 /home/K-DOM/eugeny $ x2golistdesktops

No protocol specified

xwininfo: error: unable to open display ":0"

No protocol specified

xwininfo: error: unable to open display ":0"

tunki@:51

tunki@:50

tunki@pcdir-mint13 /home/K-DOM/eugeny $