Open Source Document Management System | OpenKM

I am running OpenKM 6.2 on Windows 7 as well as on Windows Server 2003. I want to prevent concurrent user login from OpenKM. Means I want to allow only one user can login at a time with same username and password.
eg. the user with username okmAdmin has logged in then from another browser or machine no one should logged in with username okmAdmin. Is there any provision for such scenario in OpenKM or any other method or suggestion to do this.?

Perhaps you should try SpringSecurity documentation and implement a custom authentication.

Never implemented this feature, sorry.