[ { "cache": { "enabled": true }, "domain": "your.own.domain.com.", "source": { "recursors": [ "168.63.130.14" ], "type": "dns" } } ]
That will allow the query on 168.63.130.14 only for your.own.domain.com.
If you want to resolve all subdomains that contains "own.domain.com", such us "my.own.domain.com", "your.own.domain.com", etc, then you can leave the common part: "own.domain.com" and every domain containing it will also be resolved.
If you need to add totally different domains, just add a section for each one. E.g
[ { "cache": { "enabled": true }, "domain": "my.own.domain.com.", "source": { "recursors": [ "10.180.4.129" ], "type": "dns" } }, { "cache": { "enabled": true }, "domain": "otro.dominio.org.", "source": { "recursors": [ "10.180.4.129" ], "type": "dns" } } ]