hi,
what for a type of logging u have? the normal urchin style with:
LogFormat "%h %v %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i
\" \"%{Cookie}i\"" urchin ?
then u can use the request_url (AUTO) Filter. The Condition u have to
use is: ^/catalog/.*$. You can differ between GET|POST|... or so with
the Filter request_methode (AUTO). I have to used only GET request for
example.
hope that i could help you.
ringo