I made a mistake, my problem is different, I try to explain to you:
I have two user groups "registered" and "socio", the "Link unauthorized" allows me to view the article in the introductory text at all with the text "Register to read more ..." that appears in place of the "Read more ...", all this to the group "Registered" is perfect, however, for the social group I need to customize the text "Register to read more ..." to differentiate the type of article.
In single item the ability to customize the text "read more ..." through the "Display Options" only works for items with access to "Public".
I know indicate a solution to solve my problem?