Routing/firewall rules for separated pools in the same network

Hi
Is it possible to do configuration like this (CCR1006):

INTERFACES
Ether1-WAN
Ether4-LAN1 10.255.203.11
Ether5-LAN2 10.255.203.111
Ether6-LAN3 10.255.203.201

DHCP
dhcp1 on Ether4 10.255.203.12 - 10.255.203.100
dhcp2 on Ether5 10.255.203.112 - 10.255.203.199
dhcp3 on Ether6 10.255.203.202 - 10.255.203.250
Network 10.255.203.0/24 gateway 10.205.203.1

This segments of 10.255.203.0 net are also separated on HP switch. For example, hosts from 10.255.203.11 - 10.255.203.100 can not be seen by hosts from other pools.
I need to route table/firewall rules to work properly, with one gateway, but without allowing traffic between mentioned pools.
Is it possible?


Thank You for help
Bartek