Criteria : Since last connection

Criteria : Since last connection

Good evening everybody,
 
I apologize in advance if the question has already been asked...
 
I'm triying to have a different view for each user, in which will appear the contacts entered since the last connection of the user.
 
Explanations and details:
 
My contacts have a State field (NY, NJ, CA...).
I have one user for one state.
Each user can add contact for any state, but is allowed to view contact only for his own state.
For each user I want to have:
      - a view with all the contacts from the state. I succeeded that part.
                 ex: State == "NJ"
      - a view with the contacts added since the last connexion of the user (with the corresponding state of course).
                  ex : State == "NJ" && ?????
 
Thank-you very much for any help
 
Laure