How can I log only autorized queries

[Mik J]

Hello,
I'm logging queries
        channel queries_file {
                file "/var/log/queries.log" versions 3 size 5m;
                severity dynamic;
                print-time yes;
        };
        category queries { queries_file; };

And queries that are not allowed
        channel "dns_secu" {
                file "/var/log/dnssecurity" versions 2 size 10485760;
                severity info;
                print-time yes;
                print-severity yes;
                print-category yes;
        };
        category "update-security" { "dns_secu"; };
In the file queries.log I can see the queries but I would like to have it only for valid queries (not REFUSED)
How can I do this ?
Thank you
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