Short codes

Hi

I see the short codes work to hide particular content by user role. is there a short code for hiding content to a user that has no user role yet (ie a new person to the site)?

I’m trying to use this as a cms functionality so when a new person comes to the site the see some content but when they become a subscriber that content is changed to something else?

Is there a short code for a user with no user role? I have been searching for something like this for ages and if this can be done i think it solves many peoples problems out there for cms functionality?

Thanks

http://ww.wp.xz.cn/extend/plugins/wordpress-access-control/