@sendpaws @koimoa Mitra has federation filter, which works like Pleroma MRF:
https://codeberg.org/silverpill/mitra/src/branch/main/docs/filter.md
It is much less flexible (can't run arbitrary code), but filter rules are stored in database, and can be edited with CLI (and hopefully via Admin Web UI in the future).
>keyword filtering
I don't think we have that. But if you need this (or some other) moderation capability, let me know.