An explanation of user permissions is provided on this page.

• user is allowed to add additional owners to their zone (if user_view_others is set to true)
• user can remove owners (including himself)
• user cannot orphan a zone (at least one user must remain)
• user can change zone type (i.e. from native to slave)
• user can set ip of master server for slave zone
• user can change used zone template (requires zone_master_add and zone_content_edit_own permissions)