Hi Sudarshan,
You are right, it shows only one Option "Terminate this login" because :
1)When a user switches off the PC without first logging off from the SAP System,
or if the SAPGUI program is terminated prematurely for some reason,the System considers
that the user is still logged onto the SAP System.
2) The locks held by the user when the problem occurred are not released because the user is no longer active in the SAP System.
And hence the option "Continue with this logon and end any other logons in system" gets greyed out.
3) You can release the locks by logging off the user from transaction SM04, but he
will lose any unsaved work.
Regards,
Savitha