[header] How to take legal action against software licensing violations [title] Look for specialists. [step] Copyright law is a subset of intellectual property law and is usually only practiced by specialized lawyers. Due to the complexity of copyright law, if you are planning on suing someone for copyright infringement, you should hire the right person for the job. 
[substeps] When looking for attorneys, try to find a copyright lawyer comfortable with federal law and federal practice. Because copyright law is almost exclusively managed at the federal level, any attorney you hire need to be able to practice in front of the federal court you file in.