You’d need to modify various things for that, probably best if someone who’s done it or uses fog like this helps.
From what I can see thinking about it, you’d need to make tftp recognise the second address as well as the first one, and you’d need to make sure your mysql and apache service was accessable from there too. I think its more of a linux service thing than actual fog. I’m sure its doable though. Sorry I cant be more specific or helpful but I’d rather let someone who can give you a conclusive answer take this one now we know what you’re trying to do 🙂