Privacy is a very important component in any network deployment now a day's. Users are willing to enjoy the network services without letting their identity. Anonymity comes in to picture which means not letting the user identity whenever he is accessing the benefits of the network. This anonymity condition is important for few services e.g. Social Networking. But there are few services where user has to revel his identity e.g. on-line payment system, Internet banking or on-line transaction. The authors are mainly concentrating on Wireless Mesh Network (WMN). However, not all the users are honest when they are using the network services; there are certain situations where users are involved in misbehaving activities.