You can manage permissions on a user specific basis (authorised user mode) or using the Joomla 2.5 user groups.
In addition permissions can be set for specific categories so you can have users who can create/edit events in one category but not in another.
Show your support
Unlike many Joomla calendars we do not charge to download JEvents - please show your support for this project by becoming a member of the JEvents Club Club members get access to early releases, exclusive member support forums, and Silver and Gold members can use many exciting JEvents addons
Your membership will ensure that JEvents continues to be the best events calendar for Joomla.