Membership: Allow only one device to be logged into a username


I use the membership plugin to hide content from non members, but this plugin doesn't seem do to basic things as I presumed it would..

What I need it to do is to only allow one username to be logged into one device at a time. E.g you shouldn't be able to be logged in from two different places using one username.

Alexander (admin) suggested wordfence but this doesn't seem to be a valid solution. Does anyone have any ideas?

Without this option the plugin seems pretty useless and flawed :disappointed:

Any feedback is much appreciated.