sudo iptables -t mangle -A OUTPUT -m owner --uid-owner insecure -j MARK --set-mark 42
sudo iptables -t nat -A POSTROUTING -o eth0 -m mark --mark 42 -j SNAT --to-source 192.168.2.201
sudo ip rule add fwmark 42 table 42
sudo ip route add default via 192.168.2.254 dev eth0 table 42