Assigning host entries to diffrent subnets

[Eric Bloodaxe]

I have several networks on the same physical interface, I have set up 
dhcpd.conf along the lines:

authoritative;
shared-network goldall {
       subnet 158.223.0.0 netmask 255.255.0.0 {
.....various options...
    }
subnet 192.168.129.0 netmask 255.255.255.0 {
     ......options.....             pool {
                       range 192.168.129.10 192.168.129.250;
                       deny known clients;
       }
}

I have a list of clients I want to associate with the various pools; 
however when I put host directives with in the subnet scopes I get the 
following warning:

WARNING: Host declarations are global.  They are not limited to the 
scope you declared them in.

So what I cannot figure out from is how to associate diffrent groups of 
host entries with diffrent  subnets?

Thanks