Lease ip address from another dhcp server

Hello

I have a device which uses vlan id 500. For this vlan there is a dhcp server attached and it works. However, for another device with a specific mac id, again using vlan id 500, i want to assign from another ip pool and another dhcp server.

Is this possible? I have a rb5009

VLAN is used for LAN separation so what is the purpose? You can assign it staticaly form the VLAN500 DHCP but what next?