Login Limiter Business Edition for Joomla 2.5
For personal, one-man business and non-profit websites only. Limited support.
Current version 1.0.1 (compatible Joomla! 2.5.18 up to 2.5.28 incl.).
Purchase includes one (1) year free updates.

A handy user plug-in that limits the number of log-ins that a user may have during a configurable time span. When the time period has expired, the log-in counter is reset. A useful tool for websites that require an additional access control level. This Business Edition caters for both the front- and back-end and is the ultimate versatile solution for professional websites, offering additional options. In the business edition, specified users, IP addresses and ID/IP combinations can be excluded from the default behaviour or limited in their log-in. The business edition is a 'must' if you are really serious about managing the number of log-ins for your professional website.

Install or upgrade via Joomla! back-end.
Configuration overview: see here

Basic setup instructions are in the documentation that comes with the download package.

Supported languages: Front-end: configurable. Back-end: English.

License: Full business license. License terms are here.
Support: Extended support. Support terms are here.
You may find the answer to your question on our forum

Refund and discount policy: see here.

You may want to try the free trial edition first. The trial edition has limited options.