Joomla has an advanced permission system called Access Control List (ACL), and it's a great way to define groups with their own set of permissions. Unfortunately, the core Joomla ACL system can be difficult Joomla has an advanced permission system called Access Control List (ACL), and it's a great way to define groups with their own set of permissions. Unfortunately, the core Joomla ACL system can be difficult to comprehend, and that's where the ACL Manager comes in! Available in 28 languages, the ACL Manager features tools to help users easily understand and manage Users, User Groups, Permission and Access Levels. This one hour webinar offers an excellent overview of core Joomla ACL features and the ACL Manager extension.