I really want it to mine nicehash eth and zil in another stratum, I don't know if the miners are prepared for that, or they should only use a single stratum.
Thanks for your question. From what I've seen from ZIL mining so far is that you connect to a specific mining pool (one pool) that takes care of the ZIL + ETH mining. So from Awesome Miner point of view, it's a single pool that do both coins behind the scene.
I'm not sure if there are any ZIL mining pools that allows you to actually mine ETH elsewhere. I think the ZIL+ETH concept is more like merged mining rather than dual mining. Again, I'm not an expert on this specific coin so there might be other users here with more information on how it actually works.