Hi. I'm running a Professional Edition (PHP).
Is it possible to push pages where are listed in categories?
What you mean by "push" in this context?
If this is a question about the ranking of results see this FAQ
Q. How do I make some pages appear higher up in my search results? How does Zoom's page score system work?
Yes, the question is about ranking.
For example: Search word is "Audit"
1. Quality Audits
2. Internal Audit [Quality & Regulatory]
I want that result 2 should be on the first place because it is listed in a category (Quality & Regulatory). That means that all results with a category should be favoured.
Is that possible?
You can filter by category. So in the example above you would only get result #2.
Depending on how your site is built, you might be able to define multiple start points (e.g. 1 per category), and then you can apply a weighting to the start point.
Otherwise you could use the ZOOMPAGEBOOST tag on the pages you wanted higher up in the results. See the FAQ page referenced in my prior post for details about ZOOMPAGEBOOST.