One of the key problems with representing social networks in Augmented Reality (AR) is how to differentiate between contacts. In this paper we explore how visual and spatial cues based on social relationships can be used to represent contacts in social AR applications, making it easier to distinguish between them. Previous implementations of social AR have been mostly focusing on location based visualization with no focus on the social relationship to the user. In contrast, we explore how to visualise social relationships in mobile AR environments using proximity and visual fidelity filters. We ran a focus group to explore different options for representing social contacts in a mobile an AR application. We also conducted a user study to test a head-worn AR prototype using proximity and visual fidelity filters. We found out that filtering social contacts on wearable AR is preferred and useful. We discuss the results of focus group and the user study, and provide insights into directions for future work.