Today, most Internet users are worried about protecting their personal information, which may be gathered by Web services. This concern can have a profound influence on finding a way for applying privacy-aware policies on Web services. In this regard, there are just a few accessible Web services on the Web, which usually provide users with simple operation and are not able to apply the user preferences. In this paper we present a new method for applying the users' interests within the privacy-aware policies on the Web services. In this method, an extensible method for describing the users' preferences on the Web services is proposed, which along with general rules it can cover desired criteria according to privacy-aware policies.