isc dhcp class with more match

I haven't been able to test it myself, and the DHCPD.conf man page isn't that great, but you could try something like the following:

match if ( substring(hardware,1,3) = 00:01:e6 ) or
         ( substring(hardware,1,3) = 00:60:b0 ) or
         ( substring(hardware,1,3) = 00:10:83 );

This came from the following mailing list message

http://marc.info/?l=dhcp-server&m=102521117221954&w=2