In Code Igniter, destroying a specific session

Code:
$this->session->sess_destroy();



How can I end a session that was initiated on another machine and log a user out of their session?

I keep a unique id connected with their account in the session data so that I can see it in the database's session table, but it is stored among the other session data in a column named user data, the contents of which look similar to this:



a:4:

{s:9:"user_data";s:0:"";s:6:"userid";s:6:"189034";s:9:"logged_in";b:1;s:5:"token";i:1767727789;}



wherein 189034 is the user id.



Is there a method to choose a record in the session database depending on the user's id, delete the row, and then kill the session? Is there any way to accomplish this entirely?