I'm not sure if this is a support request or a feature request.

I want to create a filter for the node types in the organic group but I can't seem to figure out how to do it apart from hard coding a list of node types which would not maintain well.

I think I'm looking for the equivalent for

Organic groups: Group types
The type of a group (for example, "blog entry", "forum post", "story", etc).

But for post types not group types - and I can't see a filter which does that?