Different index based on receiving port on Heavy forwarder

Hi All, We are collecting different logs from same source on different UDP ports on Heavy forwarder. Heavy forwarder is forwarding these logs to Indexer on one port to indexer. We would like to send logs collected on different UDP ports on Heavy forwarder to be stored in different indexers on our indexer in order to apply different storage and retention policies. Can someone guide me on how to achieve this? Regards Shubham