Clarification: Artifact Validation Policy

Seeking clarification on: Artifact Validation

With artifact validation policy, is there a way to search for a pattern or regex, as a filename? I am trying to verify that some spreadsheets have been attached to an asset, they contain scoring from a code review, for example. I might require one or three of these attachments depending on the type of code asset. They might be .xls or they might be .ods (guess I could extend to other types if I need). There also are code review templates for different technologies, like Java, C++, etc.

So I have files like: java_code_review.xls, cpp_code_review.ods, etc.

Here's a mock up of what I'm trying to do:
If asset cat. is SILVER, Asset must contain ONE artifact with filename like
*_code_review_.(xls|ods)
If asset cat. is GOLD, Asset must contain THREE artifacts with filename like
*_code_review_.(xls|ods)

Is there a way to do that?