wpgear

Ext Security. 
Dashboard & Daily-Digest about users activity. 
Now the console has a widget that displays last login users, whith: Date-Time, IP address (whith Whois info) and Device type/Browser.
<h4>Features</h4>
<ul>
<li>Even without going to the site admin area, you will be informed about the activity of the current day.</li>
<li>Any person can be a recipient of notifications. Not necessarily the Administrator.</li>
<li>Now in the Admin console you have a new widget with a list of users in order of decreasing Login time.</li>
<li>Determine and save the IP address, device and browser details, from which the was made Login. (if your server is configured correctly). For better informational content, in order to be able to determine the parameters of the User’s devices (OS, Browser, Type Device), you should have a PHP extension on the server: “Browscap”. Alternatively, you can use the Lite-Version – Plugin: “quick-browscap” from the official WP repository.</li>
<li>It is important to understand that the time to enter the site and the time of the last activity of the user are different events.</li>
<li>Displays “Login Success” Statistics for each User.</li>
<li>Displays Count “Users Activity” in Admin Bar.</li>
</ul>

Users Login Monitor

A freeware plugin, for daily-notify site administrator, about users who logged in during the day.

codersantosh

AcmeIT

AddonsPress

Yam B Chhetri

This plugin limits login to one device at a time for a user. 
If the same user login from another device, that user won’t be allowed to log in. 
Admin can set up an ‘Already login message’ for that user.
If the user has been inactive for too long, then the user is automatically logged out and that user allows to log in again either from the same device or another device. 
Admin can set up ‘Auto Logout Duration’ for users.
It tracks the user’s activity like user status ( Active/Inactive ) and Last active time. 
Admin can view user status from WP Admin > Users > All users. From the “User Status” column, the user current status can be viewed.
Admin can set up only one device login limit plugin from WP Admin > Settings > Limit login
Note: This plugin is compatible with most of the membership plugins. 
If you find any issues, please use <a href="https://wordpress.org/support/plugin/only-one-device-login-limit" rel="ugc">support forum</a> to report.

Only one device login limit

Very useful plugin for security purposes



works like a charm

Limit login to one device at a time for a user. Configured options from the admin

Users Login Monitor vs Only one device login limit