You can now define permissions for individual comments by listing specific people who have access to the comment. The lock icon which we had previously in the toolbar to mark comments as private or public has been replaced by a menu with the same private/public options plus an option to make the comment private to the author only as well as the option to define permissions by name. Permissions can be useful to share comments with a specific subset of people or to share comments with clients or external users only for example to share confidential billing information with clients which you don’t want other colleagues in your company to access