Well, on the SCD diet, you're supposed to make your own SCd yogurt, which is made with milk, although they recommend those who can't drink cows milk, should try. Asking the yogurt with goat's milk.
The fermentation process of making yogurt renders it 99% lactose free, however other than the yogurt, most of those on the SCd diet drink either almond, coconut, or hemp milk.
I would imagine you should also be able to drink plain kefir.