Add a views with fields of nodes added from admin in the user profile
With views you can display tables of items which are related to each other, like content users have created or fields of specific nodes of content.

Your question is not entirely clear. If you want to only show specific fields of a content type to a specific user those fields must be filtered by user ID, using a contextual filter.

If you want admins to be able to specify which fields are shown to which users you may want to use flags, and then filter your view of content on the flags which have been set.

If you can explain in more detail exactly what you are trying to do I may be able to help more.