Exclude Website from logging

You could achieve this in different way.

One of them is a specific policies above the current matching one with specific destination field (destination IP for example); in this policy you could disable logging or apply a webfilter profile with allow instead of monitor.

Another (and probably more elegant) one is to use web rating override. You could specify that URL assigning it to a custom category and then you will allow that category without logging it.

Another approach that we are finding useful when presenting a summary of a person's Internet usage to a manager is to exclude the "noisy" categories that manager's typically don't understand or care about.  We still log everything, but we don't present everything unless someone really needs detailed history.  For example, we do not present a summary of supposed elapsed time spent in the following categories: