Ну а как оно прописалось смотрел? sudo iptables-save
-A OUTPUT -m owner --uid-owner dima -j DROP
-A OUTPUT -m owner --uid-owner dima -j DROP
-A OUTPUT -m owner --uid-owner dima -j DROP
-A OUTPUT -s 192.168.0.100/32 -m owner --uid-owner dima -j DROP
-A OUTPUT -s 192.168.0.0/24 -d 192.168.0.0/24 -m owner --uid-owner dima -j DROP
-A OUTPUT -s 192.168.0.0/24 -d 192.168.0.0/24 -m owner --uid-owner dima -j DROP
-A OUTPUT -s 255.255.255.0/24 -d 255.255.255.0/24 -m owner --uid-owner dima -j DROP