In the permissions for Node Convert I can choose which node types are available for convertions and which node types can be converted into. What I'd like is to also be able to decide more granularly which node types that can be converted into which node types.

Say that I have a node type A that I want to be able to convert into node type B and at the same time have a type C that can be converted into type D. A shouldn't be possible to convert to D, neither converting C to B.

I don't know if this should be a support request or a feature request, but since it seems like a common usecase it seems likely that I've just missed how it is done.