Thanks for your answer!
I tried it out, but it is not working for me. Seems that tags for parent blocks are not inheritable, at least as far as filtering is concerned. In queries it will work. But queries also worked with block-properties, so there is no gain here.
I found out that there is a request, that is very similar to my problem, so i will link it here:
https://discuss.logseq.com/t/filters-for-linked-references-inherit-from-parent-blocks/4259/8
Greetings