Vallo's in it's own universe. Or other dimension. Whatever you want to call it. It wouldn't show up on any charts of yours. We can't really say where it is, because we don't know exactly where it is, just in another dimension that's not our own.
You can filter to certain people on the network, but only if they're here and you set it to filter to them. I know Obi-Wan is here, if that's who you mean by General Kenobi?