Lemmy itself allows you to block communities, instances, and users. But it does not support filtering by keyword, e.g. filtering out any post with the word “platypus” in the title regardless of where it was posted or by whom. With help from the comments below, here are some third party Lemmy clients that have their own implementation of keyword filtering:

Eternity

Raccoon

Summit

Tesseract

Thunder

Voyager

Do NOT support keyword filtering:

Alexandrite

Jerboa

Lemmy UI

mlmym

Next

Photon

https://feddit.uk/post/18770058

[–] [email protected] 2 points 1 week ago (2 children)

Connect also supports keyword filtering.

[–] [email protected] 1 points 1 week ago (1 children)

Thanks! Any idea about other closed-source clients like Sync or Boost?

[–] [email protected] 1 points 1 week ago

Sync has pretty extensive filtering options

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