Yes, you can do that. Make a JSON of the mac to filter, like

{
"ab:cd:ef":true,
"ab:cd:eg":true
}

and then run the FIND server with the -filter whitelist.json.

Thank you, but how can I know that is working fine. When I have clicked on "Update" button in administration, it will generate me the group file (grid_4.rf.json), which contains all MAC address as before. Also the same in new group.

I using Docker and i put the white list into the /tmp forlder just for shure.
Also I have changed supervisord.conf where i put -filter into the command

command=/usr/local/work/src/github.com/schollz/find/find -rf 5009 -mqtt localhost:1883 -mqttadmin admin -mqttadminpass 123 -mosquitto pgrep mosquitto -data /data -filter /tmp/whitelist.json

my whitelist.json
{
"e4:8d:8c":true,
"d4:ca:6d":true,
"cc:2d:e0":true,
"6c:3b:6b":true,
"64:d1:54":true,
"4c:5e:0c":true,
"00:0c:42":true
}

So fingerprint.go => func filterFingerprint why is there
newFingerprint[curNum].Mac = newFingerprint[curNum].Mac[0:len(newFingerprint[curNum].Mac)-1] "0"

I need to filter mac "e4:8d:8c:f1:fa:76" but this line makes it to "e4:8d:8c:f1:fa:70". So I have removed this line and filtration working fine.