Not really. Given that you're still transmitting the same data no matter whether it's streaming or downloading, there's no way to prevent your neighbor from saving the stream. Now, it is conceivably possible to obfuscate it enough that it becomes difficult to download, like having it stream via RTSP or something, but it will never be impossible to download while making it possible to stream.

Now the question is whether that sort of obfuscation is good enough for you and whether you're interested in creating that obfuscation, as there's not currently any such function within the empeg or any add-ons that I'm aware of.