The Buddhist "Middle Way" is to be in between extremes - indulging on one hand, suppressing on the other. "Wanting, wanting" on one side, "hating, hating" on the other. It's a general term, "Middle Way", as it is used in Buddhism.
The Buddha himself lived a life of luxury as a prince when he was growing up. Everything he needed, everything money could buy, he had. Every material happiness. Then he went the other way, he practiced severe austerities of starvation, etc. He tortured himself, he nearly died. Those were the two extremes - of the basic human living condition that he experienced. Then he found a "Middle Way" in between them.
So, the term "Middle Way" within Buddhism has various different meanings. Moderation in smoking and drinking does not fit into the Middle Way. This word "moderation", in this context deals with social norms, social rules. Moderation in social terms. Its not moderation in Buddhist terms. Socially some people would think, "Oh well, you know, if you don't smoke much, if you only share a cigarette with somebody once or twice a day, if you only have one glass of wine each day, that's okay." In the social world, they may think, "Well that's definitely moderation. Oh yes, that's a middle way. They're not totally a drunk/alcoholic, they're not totally sober without ever touching any alcohol, they're in a kind of middle way moderation. Socially they might say that they are on the "middle way", but in Buddhist terms, no, that has nothing to do with moderation in Buddhism.
Moderation in regards to food, that would still work in Buddhism. Moderation might be very similar to the Middle Way for something like that.