put this in your $shellrc and enjoy

portfinders.zsh

# Find ALL the port users. _o/
findbyport() {
  lsof -nP | grep  ":$@" | awk '{print "Program: " $1 "\n" "PID: "$2 "\n" "User: " $3 "\n" "Address: "$9 "\n" "Action: " $10}'
}

portsinuse() {
  lsof -nP | grep "IPv" | while read line; do echo $line | awk '{print "Program: " $1 "\n" "PID: "$2 "\n" "User: " $3 "\n" "Address: "$9 "\n" "Action: " $10}'; echo; done;
}