[logback-user] Separate log files for different threads

Hello, I am wondering if it is possible to separate logging based on thread names? I would like logs generated by every thread to go into distinct log files, one log file per thread e.g FILE-${thread}.log. I know that I can have all threads write to a single log file and then grep on thread name, but want to know if there is a better approach. I have tried SiftingAppender and put the thread name into the MDC in each thread, but it didn't work. Thanks