You can act for both buyer and seller in PEXA by adding additional roles. However, you can't assign one workgroup to one role and a different workgroup to the other role. There is a single point for configuration of email notifications which is global across both roles. Also, there is a single Conversations section and conversations are not separated for the two roles. The result is that any other Chinese wall is defeated by notifications and conversations being globally visible to both sides. I would like to see the platform so that conversations are not global for a workspace but are separated for each role within the workspace, and likewise for email notifications.