As a longtime vegan, I'm used to looking up Barnivore. (Yay Barnivore! \o/)

However, a (non-vegan) German friend of mine recently told me that all beers in Germany are vegan. When I pushed her on it, she gave me a link to this Wikipedia article

It talks about German "Purity Law", stating only a very limited set of ingredients are allowed, and that there are bodies that supervise this to ensure that standards are met.

I know that clarifiers are a concern here.

Does this Purity Law extend to process thereby making every German Beer vegan?

What exceptions should I look out for when drinking beer in Germany?

Do the same laws apply to German beers produced for export?