When editing my locally installed wordpress blog using two different browsers, it is possible to be logged in as the same user with both browsers. I am assuming (perhaps incorrectly) that this implies that it would be possible to log in to a live site multiple times concurrently (abeit using different sessions) using the same user account.
I would like to prevent this from being possible, and display a "user already logged in" type message should a user account be in use when someone else tries to log in using the same username and password. Is this already an option in wordpress? Is there a plugin that can achieve this? Would this require editing the source code (if so a few pointers would be appreciated!)?
I'd really appreciate some help, I have spent a fair bit of time searching for a solution to this issue. It may be glaringly obvious, or already documented somewhere on wordpress.org, apologies if that's the case.
Thanks in advance!