We may need just a little more help from you to offer help to you. Detail for us: what are the criteria by which a log entry should be ignored?

Working that one out, explicitly, may even give you the answer. :-)

But, that said, suggest you replace:

|| ($values[8]=~m/(304)/) || ($values[8]=~m/(302)/) || ($values[8]=~m/(301)

with

|| ($values[8]=~m/(30[124]/)

The use of the character class -- essentially meaning 'any of the elements inside the square brackets' will make your code more readable (and hence, more maintainable).