extend read-only feature of joomla ckeditor

CKEditor has the ability to set the article in read-only mode ( [login to view URL] ). I want to have extended this feature, so that I can specify which elements of the article can be edited and which not. Example: In Article is a table. I want to specify that the change of table size, color, position and etc is read-onle mode. Other Example: In Article is some text that should be read-only mode. I think that in the results I had to add some attribute in the HTML code of article which will help for CKEditor decide to allow edit the text or something else or not.