Project members in the external Organization can be either a Manager, or Annotator in shared Projects.
Manager in a shared Project
Managers in the external Organization are active contributors to the Project but do not have administrative permission except adding/removing members from their own Organization. They can:
Project administration
Add/remove members from their own Organization
Annotation
Annotate images
Collaboration
Leave comments
Annotator in a shared project
Annotators are active contributors to the Project, but have no administrative permissions. They can:
Annotation
Annotate images
Collaboration
Leave comments
Recap
Here is a visual summary of the different permission levels for each role: