We have added an option to filter by a particular AOC assigned to the crew members.
If selected, Leon will only display crew members assigned to a a given AOC. The AOC can be assigned to crew members in full edit Profile page under the tab 'Ratings'.
It is possible to give users access to Crew Calendar with View only option. Such user or group of users will not be able to make any roster changes. To enable this, go to Settings > Privileges and make sure that the resource Crew Panel for the particular group of users is set to VIEW.