?
We wanted to include versions in our Connector Filters, but it wasn't really practical. If memory serves correctly, NuGet's ODATA implementation sees version numbers as strings, thus you couldn't do version ranges or anything like that.
I think someone on our team submitted an issue to NuGet about this, but as far as I know it's still treated as strings.
So, until then, your best bet is to manually craft your feed. One trick someone suggested was to create a feed with a connector to nuget.org and then download packages to a "Allowed NuGet PAckages" feed (no connectors) --- both of which share the same local directory.