When in the Admin Control Panel, viewing a user's logged IPs, you have the option to search for more users with the same IP. However, in some cases the search returns no results, even when there are multiple users with the same IP.
Haven't been able to track this down but I can confirm that the IPs are logged for multiple in the xf_ip table, and show up in the ACP when viewing the members individually, but do not appear when running the check.
Haven't been able to track this down but I can confirm that the IPs are logged for multiple in the xf_ip table, and show up in the ACP when viewing the members individually, but do not appear when running the check.