Feature Request - Adding a Datasource instance to a group

If I interpret correctly, this is similar to a feature that would be valuable to us as well, EX:

it would be great if there was a way to create a grouping of Interface datasource instances (individual interfaces) from disparate routers. This would allow creation of a group that included only router-to-router interfaces which typically deserve different treatment than the thousands of end-user interfaces we have. I'd love to hear ideas how others may have accomplished this in the meantime.