two entries in your /etc/dhcpd.conf file:

subnet 192.168.2.0 netmask 255.255.255.0
{
  range 192.168.2.150 192.168.2.200;
  option routers 192.168.2.53;
  option broadcast-address 192.168.2.255;
}

subnet 192.168.4.0 netmask 255.255.255.0
{
  range 192.168.4.150 192.168.4.200;
  option routers 192.168.4.53;
  option broadcast-address 192.168.4.255;
}

The "routers" entry should have the IP address for the router of each
subnet (which will necessarily be different).
-----------------------------------------------------
# eth0
subnet 192.168.32.0 netmask 255.255.224.0 {
        range 192.168.32.1  192.168.63.200;
        option broadcast-address 192.168.63.255;
        option routers 192.168.63.250;
        option netbios-name-servers 192.168.63.250;
        }

# eth1
subnet 192.168.64.0 netmask 255.255.224.0 {
        range 192.168.64.1  192.168.95.200;
        option broadcast-address 192.168.95.255;
        option routers 192.168.95.250;
        option netbios-name-servers 192.168.95.250;
        }