Eclairman's User Login Blocker

Eclairman’s User Login Blocker lets an administrator prevent chosen user accounts from logging in, while everyone else logs in normally.

Blocked users cannot authenticate, and if they already have an active session they are redirected away from the WordPress admin.

Features:

• Block or allow any user with a single checkbox.
• Searchable, sortable user table showing ID, name, username, email and role.
• Sticky table header and scrollable list for large sites.
• Blocked users made through search filters are preserved on save.
• No configuration required — nothing is blocked until you choose to block it.