Is it possible to filter recommendations by labels?

[omerfdmrl]

From the documentation, it is clear that labels are used internally for similarity calculation and user-item matching.
However, I could not find any endpoint or configuration that allows filtering recommendations directly by labels.

For example:

• My articles and other contents have author label like "author:5", and I want to recommend contents based on author in user profile. So I should be able to filter recommendations by labels.

My questions are:

1. Does Gorse currently support filtering recommendations by labels?
2. If not, is there any recommended workaround (e.g., using categories instead of labels)?
3. If it's not possible at all, how can I implement it?