Terminate previous user login for multiple concurrent user login

[eluser]Unknown[/eluser]
Deleting in table in not an issue i can delete the previous if the user details is identical. But i have to navigate previous session user web page to login page. If the user continuously navigate the page means i can check the session and navigate to login page. But there having single transaction page(Live market Rate Display Page). There user will monitor rates, there i have to check like push notification.