root@router:/usr/local/firewall# iptables -A OUTPUT -t = mangle -m owner --uid-owner 1016 -j MARK --set-mark 99 -v
MARK  all opt -- in * out *  = 0.0.0.0/0  -> 0.0.0.0/0  OWNER UID match 1016 MARK set = 0x63
iptables: No chain/target/match by that name
root@router:/usr/local/firewall# ps -u 1016
  PID = TTY          TIME = CMD
11197 pts/5    00:00:00 bash
11213 pts/5    00:00:00 do
22256 pts/5    00:00:00 donkey
17494 pts/5    00:00:00 donkey
17461 pts/5    00:00:02 donkey
19641 pts/5    00:00:00 donkey
25142 pts/5    00:00:00 donkey
 2563 pts/5    00:00:01 =
22335 pts/5    00:00:00 donkey