When - pass through

How is it possible to use different when conditions for a variable? E.g. C should be added in every list here (except other):

        list.forEach {
            when (it) {
                is A -> listA.add(it)
                is B -> listB.add(it)
                is C -> listC.add(it)
                else -> other.add(it)

    interface A
    interface B
    interface C : A, B

Found same question here now, didn’t find it first time. What about continue? It’s not convenient to use ifs especially with when’s else.