It’s also supported by Prowlarr if you want to automate downloads using Lidarr.

Having said that, note that many uploads on rutracker are raw CD dumps (ISO file, plus a CUE file specifying when the tracks start and end) which Lidarr doesn’t support directly, so you’ll have to manually convert to FLAC and split it yourself. Once you do that, you can manually import the files into Lidarr and it’ll tag and arrange the files for you.