title: How to control duplicate login process in seam
body: <p>my project is using JSF2.0, Seam 2.3 and Spring 3.0</p>
  
  <p>login process is develop by Seam Security.</p>
  
  <p>my problem is want to control the duplicate user login as follow:</p>
  
  <p>Time1 :  User A @PC1 >>>>>> login system with userID: 11111 >>>>>>>>>> (Status:OK)</p>
  
  <p>Time2 :  User B @PC2 >>>>>> login system with userID: 11111 >>>>>>>>>> (Status:OK)</p>
  
  <p>At this time, i like to invalidate and logout automatically <code>User A</code> from system</p>
  
  <p>How can i do this and any suggestion is welcome</p>