A computer-implemented method and system is disclosed in which a network-based interaction environment includes a plurality of peer-to-peer nodes being able to communicate directly with each other using a peer-to-peer protocol and a peer-to-peer client application, and a first peer-to-peer client application running on a first peer-to-peer client of the plurality of peer-to-peer nodes, the first peer-to-peer client application to maintain persistent user account information on the first peer-to-peer client, the persistent information being related to a plurality of user accounts for conducting e-commerce interactions on the network-based interaction environment, the plurality of user accounts including at least one user account based on a plurality of roles of a corresponding user.