This is a colony owner. They can add and remove members to their colonies.
This is a regular user that has creative mode enabled.
Low level moderator. They have the ability to kick, ban and jail people. They can also control time and weather.
Is responsible for keeping the chat in order and making sure people behave properly.
High level moderator. Has all the abilities and resposibilities of a guardian but have access to more complex commands like world edit and colony regioning.
Server owner. Your malvolent benefactor.