Based on the available Airbyte documentation, there is no mention of a built-in way to filter the usage_records stream by category directly within the Twilio connector configuration. The documentation lists usage_records as a supported stream and notes that it supports incremental sync, but does not describe any filtering options or parameters for categories in the connector setup or YAML configuration [Twilio Supported Streams](https://docs.airbyte.com/integrations/sources/twilio#supported-streams). If the Twilio API itself supports filtering by category, this capability is not currently exposed through the Airbyte Twilio connector according to the provided documentation. You may need to sync all usage_records and then filter by category in your destination, or consider submitting a feature request to the Airbyte team if this is a critical need.