How to change the category name of the log when calling REST client by using Ivy.rest().client(...) ?

Thank you for your suggestion. But I have traced Ivy core, and I see: every time Ivy rest create a WebTarget instance, it registers a filter to trace log with specific category name "rest_client" in RestCallLoggingAndHistoryFilter class. It traces all rest request with same one category. With your suggestion, I only could forward log of all requests to one log file. So, my requirement needs to separate the log content for every request, every request to every log file. How could I do that? I tried with log4j content filter by regular expression, but it is not working well. And I tried another solution: use java reflection for changing the runtimeLogger property in that filter to separate them to every log file for every request. But I think this solution not good if the variable has been changed the name in the future or this way will make performance slower a little bit. Do you have any better solution for this requirement?