1. A method of establishing an application contact list on a client station, wherein the client station includes a master contact list including a plurality of contact entries for a user of the client station, the method comprising: identifying a service associated with a network application to which the user of the client station subscribes; identifying a network user who subscribes to the service associated with the network application; determining if a contact entry in the master contact list corresponds to the network user; if so, sending a message to the client station instructing the client station to mark the contact entry in the master list with an identifier, wherein the identifier identifies the contact entry as a contact entry that is associated with the network application, and storing the identifier.