For anyone using the latest Raspberry Pi OpenZwave Image, the support for multiswitch outlets is limited. I have not had much of a chance to work on it but I have a quick update to the Basic OpenZwave Socket server that will allow easy control over the switches. To install, download the zip and copy the files into the appropriate web directory by typing ‘OZW’ then ‘cd basic’.
Again, this is a quick fix not a final solution. If you are not using dimmer switches, you probably don’t want to do the update.