if then

I'm trying to wrap my head around this..... (small head). Try to have this shorter, have tried several ideas but no success. maybe some have any idea.. if [ "$vpn" = "route-up" ] && [ "$var" = "client1" ] || [ "$var" = "client2" ] || [ "$var" = "client3" ] || [ "$var" = "client4" ] || [ "$var"...