The Blogs module leverages the standard security used for all documents, as blogs are actually documents in the content tree. The Blogs module also has the following permissions in Site Manager -> Administration -> Permissions:
•Manage comments - allows members of the role to manage blog post comments
•Read - allows members of the role to view blog posts and blog post comments via the administration interface
To manage blog posts, you need to be one of the following:
•owner of the blog
•granted with the Manage comments permission for the Blogs module in the Administration -> Permissions dialog
The blogs in the My Desk -> Blogs dialog are displayed only to the blog document owner.