Login Limiter Premium Edition for Joomla 2.5
For personal, one-man business and non-profit websites only. Limited support.
Current version 1.1.1 (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 Premium Edition caters for both the front- and back-end and specified user groups can be allowed unlimited log-ins. Front-end messages can be configured to suit the local language.

The Business Edition 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: For personal, one-man business and non-profit use only. License terms are here.
Support: Limited 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.