Hi,

Indeed, we kept the Metadata Adapter interface very small. In the "NotifyNewTables" case, we notify each client request as is and leave to the Metadata Adapter the burden of a redundant group name translation.

About client identification details, note that Lightstreamer Server is meant to be used either with a rich client or (when a browser is involved) beside a regular Web Server.
So, for now, you can try to take advantage of their capabilities in order to collect client information and share it with the Metadata Adapter.

We keep this kind of feedback for planning our future extensions.

Dario