use the password option to set you desired price.
lets say
westhash
btc addy
p= 0.191
next worker do
westhash
btc addy
p = 0.190
wait a minute I will find a screen shot for an s-3
now look at buyers for today. the lowest buyer is paying 0.190
so if you use 0.190 then 0.189 then 0.188 then 0.187 you can tell your gear apart. yeah one gets paid a little less then the other. but if the buyers of hash drop price a bit it still gets paid.
right now all 4 get paid 187 188 189 190 but if buyer drops to 187 the 187 gets paid the rest roll over to your other pool choice.
or set four workers at .0190 and use 4 btc addresses