#!/bin/bash

LEASES_FILE=/var/lib/misc/dnsmasq.leases

print_vlan()
{
    echo "Hosts in VLAN $1"
    grep 192.168.$1. $LEASES_FILE | sed 's/^/  * /'
}

for vl in 20 30 40 50 60 90
do
    print_vlan $vl
done