Nomad Programmer

It will help you to make only one logged in at a time on WordPress sites. if user wants to log in two or other places than it will destroy all other sessions.
This Plugin uses function like WordPress 4.1, that have a button on the user profile screen which clears all other sessions, and on the user editing screen which clears all sessions. This plug-in can limit simultaneous login. This plugin use for every user automatically.
<h3>Licence</h3>
<a href="https://wordpress.org/about/gpl/" rel="ugc">GNU General Public License</a>

One Active session

Working till now

This plugin clears all other logged in sessions and allow only one login by one user

Ga Satrya

Remove dashboard access to non-admin users and easily control who can access your WordPress dashboard with simple configuration. By default, only administrators are allowed, but you can now whitelist specific trusted users by username—perfect for developers, VAs, or contractors.
Features include:
<ul>
<li>Whitelist specific users by username</li>
<li>Session expiration controls (1-24 hours)</li>
<li>Option to apply session timeout to administrators</li>
<li>Custom redirect URL for blocked users</li>
<li>Secure, validated, and sanitized settings</li>
<li>Hide admin toolbar for non-authorized users</li>
<li>Developer-friendly filters for advanced customization</li>
</ul>
Why Choose UserFlow?
<ul>
<li>Maximum Protection: Instantly block unauthorized users from accessing sensitive dashboard areas.</li>
<li>Effortless Whitelisting: Grant dashboard access to trusted users (developers, VAs, contractors) without changing their roles. Just add their usernames!</li>
<li>Session Security: Automatically log out users after a set period for bulletproof session management. Choose from multiple timeout intervals and apply to all users or just non-admins.</li>
<li>Custom Redirects: Guide blocked users to a branded page or helpful resource instead of the generic homepage.</li>
<li>Zero Configuration Needed: Works out of the box—only administrators can access the dashboard until you customize settings.</li>
</ul>
Perfect For:
<ul>
<li>Website owners who want peace of mind</li>
<li>Agencies and developers managing multiple sites</li>
<li>Teams needing granular dashboard access</li>
<li>Anyone serious about WordPress security</li>
</ul>
Protect your site, empower your workflow, and deliver a professional experience—all with one lightweight plugin.
<a href="https://www.ctaflow.com/plugins/admin-only-dashboard/" rel="nofollow ugc">Read more detail</a>

UserFlow – Disable Dashboard Access for Non Admin

UserFlow: Only admins can access the dashboard by default. Whitelist trusted users easily, quick setup, and secure.

One Active session vs UserFlow – Disable Dashboard Access for Non Admin