i have 2 feminelos lunario planted in ground 2 years ago which are doing fine, but they have not been tested yet, because temperatures did not drop under 0 C. However i know they are sensitive because one tree in dooryard not far from me, has lost all the leaves. My guess is because of the cold wind. That winter 3 years ago was colder with some snow which has melted same day. unfotunately i do not know exact temperature, but i would guess -1 or - 2. Cold wind called bura (bora in english) does most damage here.
i have never seen damage from cold on any other citrus sort.