In present CA API Gateway logs of every policies gets logged in same default log location / file, is there any feature / configuration which allows to configure different log file for each policy separately ?
You can use a custom logger to write to a specific log sink. You just configure audit assertions within the policy to write to the custom logger, as documented here : Creating Log Sink for Custom Logger
you can create new log, type FILE, and add filters Gateway Log and Policy, like Bill said, there is more info under our docops
Creating a Log Sink - CA API Gateway - 9.2 - CA Technologies Documentation