I have also found lactose free mozzarella (believe it or not), natural yoghurt & even ice-cream at Migros.
Incidentally, you can buy an over-the-counter medication here called Lacdigest, which is useful to have on hand if you have a lactose intolerance, as it allows you to digest small amounts of lactose - for example if you are invited out to dinner and offered something with cheese sauce. My doctor recommended it to me. It's not covered by insurance, but it wasn't outrageously expensive for a bottle of 50 pills (I'm afraid I can't remember how much), and so far one pill has been fine for me when I've needed (or sometimes just wanted) to take one.
I live in Luzern, but am often in other parts of the country looking for a milk coffee. So far I've found one in Bern 'Tibits' with soya-almond milk coffee.
Please feel free to add to this almost non-existent list!
http://www.scientifica.ch/ausstellun...ahrungsmittel/
Loads of other stuff over the weekend too, including an earthquake similator.... But that's off topic