gistfile1.txt

options {
...
};
view "one" {
        match-clients {
                key "key_one";
                !key "key_two";
                !key "key_three";
                ...
                !key "key_n";
                192.0.2.0/24;
        };
        // zone statements go here for the view
        ...
        // you're going to need multiple server { ... }; blocks if you have more than one slave
        server slave|master {
                keys "key_one";
        };
        // don't need the allow-transfer on slaves
        allow-transfer {
                key "key_one";
        };
};
view "two" {
        match-clients {
                key "key_two";
                !key "key_one";
                !key "key_three";
                ...
                !key "key_n";
                198.51.100.0/24;
        };
        ...
        server slave|master {
                keys "key_two";
        };
        // don't need the allow-transfer on slaves
        allow-transfer {
                key "key_two";
        };
};
view "three" {
        match-clients {
                key "key_three";
                !key "key_one";
                !key "key_two";
                ...
                !key "key_n";
                203.0.113.0/24
        };
        ...
        server slave|master {
                keys "key_three";
        };
        // don't need the allow transfer on slaves
        allow-transfer {
                key "key_three";
        };
};
...
view "n" {
        match-clients {
                key "key_n";
                !key "key_one";
                !key "key_two";
                ...
        };
        ...
        server slave|master {
                keys "key_n";
        };
        // don't need the allow transfer on slaves
        allow-transfer {
                key "key_n";
        };
};
// generate the following with ddns-confgen -k key_one, etc.
key "key_one" {
        algorithm "...";
        secret "...";
};
key "key_two" {
        algorithm "...";
        secret "...";
};
key "key_three" {
        algorithm "...";
        secret "...";
};
...
key "key_n" {
        algorithm "...";
        secret "...";
};