Block Double Logins – Protect Your Membership Site

Protect your membership sites – prevent users from sharing accounts
block users from simultaneously using the same WP account
block users from simultaneously logging in to multiple accounts from the same IP
block users who hide behind a proxy
see who’s online at any given time
see who’s trying to share their account
choose which user roles are affected by plugin’s rules and which are not
built-in fail-safe if you lock yourself out
session timeout can be adjusted
plugin is ready for use 5 seconds after install
works with all themes