Other filters for attribute values

**Is your feature request related to a problem? Please describe.**
It would be nice to have additional filters for attribute values like '<', '>' e.g. for integer or date values.

**Describe the solution you'd like**
Pass a string containing a comparism like `my_attribute > 0' via the api and return corresponding results.

**Describe alternatives you've considered**
Get each user and compare the attribute.

**Additional context**
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