DHCP logic to work with PXE

Hello dear forum users, can you please tell me whether it is possible on MikroTik to implement this logic for DHCP:

if option arch = 00:06 {
filename “pxelinux/bootia32.efi”;
} else if option arch = 00:07 {
filename “pxelinux/bootx64.efi”;
} else {
filename “pxelinux/pxelinux.0”;
}

This has been requested several time. I think it is still not possible:

http://forum.mikrotik.com/t/feature-request-conditional-dhcp-options/86933/1
http://forum.mikrotik.com/t/dhcp-pxe-arch-type/81637/1