Well that was its origin, but it morphed a bit
Basically it allows you to specify whether a section of the page is visible based on the logged in (or not) role
shortcode = cj_ud
roles = comma delimited list of roles you want to check
musthave=true|false
If musthave is true the user must have one of the listed roles
If musthave is false the user must NOT have any of the roles listed.
Example
[cj_ud roles=”administrator” musthave=”true”] Only an administrator will see this[/cj_ud]
[cj_ud roles=”administrator” musthave=”false”]Everyone except administrator will see this[/cj_ud]
roles defaults to administrator and musthave to true