Got it solved. Changed the storj host to the external ip and cvhanged the storj port to the correct one:
docker run -d --link=Localnode2 --name=storj-exporter-node2 -p 9652:9651 -e STORJ_HOST_ADDRESS=192.168.8.51 -e STORJ_API_PORT=14003 anclrii/storj-exporter:latest
Dont know why it didnt work before. (Maybe the system restart helped)