A role determines what the user, who plays that role, can and cannot do with comments. Each role has a default set of permissions.

RoleCreateReplyEditResolveDelete
Consumer/Editor(error)(error)(error)(error)(error)
Consumer/Editor (author)N/A(tick)(tick)(tick)(tick)
Collaborator(tick)(tick)(error)(tick)(error)
Collaborator (author)N/A(tick)(tick)(tick)(tick)
Contributor(tick)(tick)(error)(tick)(error)
Contributor (author)N/A(tick)(tick)(tick)(tick)
Manager/Coordinator(tick)(tick)(tick)(tick)(tick)

These roles can be assigned for the site or for the particular content, that is, published project.