The Commerce visitor group Customer properties contains a couple of nice properties like Birth of date, Customer Group etc.
Is it possible to extend that list with other customer properties or do I have to build my own criteria for that?
You will have to create your own, however we could create a feature request to add this functionality out of the box
Please do, It would great if you could select from added meta data per default in the Customer properties vistor group.
Any news on this one or do you still have to create your own?
No this was not yet addressed.