Joomla website can be managed both by (a) Public Front End (b) Public Back End Users. In Public front end we can create user groups like registered user, author, editor, publisher. While in Joomla public backend we can create user groups like manager, administrator, super administrator.
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But sometime we required to customize and create our own user groups. This is really not possible by the default extension of Joomla. To our good luck, Joomla have more that 3000 thirty party extension and while searching I found an extension that allows to create our own user groups in Joomla. Extension Name :JACLPlus Pro v1.5.7. This extension can be downloaded from http://www.byostech.com. The core function of the extension is to allows Joomla webmasters to create new user groups or new access levels.