This chapter discusses the interplay of participation and non-participation within institutional and public practices of electronically mediated policy-making in the local public sector. The aim is to contribute to practice-based development of situated theoretical conceptualisation in the research domain. Applying a dialectical analysis, including also examples and processes of dissociation detected in ethnographic studies of actual use and design of these technologies, suggests a re-specification of the conceptual basis of eParticipation.