ACL usage

Is there a way to specify IPs for options like forwarders {}, also-notify{},
masters {} and others using ACLs? BIND (9.2.4) get's very upset at such
entries:

acl "fwdservers" { xxx.xxx.xxx.xxx; yyy.yyy.yyy.yyy; };
forward first;
forwarders {"fwdservers"; };

or

acl "mstservers" { xxx.xxx.xxx.xxx; yyy.yyy.yyy.yyy; );

zone "example.com" {
type slave;
file "slave.example.com";
masters {"mstservers"; };
};

Peter