Regarding dina dmalchusa, many poskim (incl. Rav Elyashev) hold that dina dmalchusa only applies to issues between a person and the gov’t (i.e. taxes) and does not apply to issues between one person and another person (i.e. financial).
DY: In addition to the point I made in the previous comment, please clarify on what halachic basis you feel copying isn’t permitted under halacha. (More than Rav X said so. Rather, the basis why he says so.) I believe it will be the taking business away principle, and not theft. (As shoplifting a camera would be theft, but I.P. copying would not be, halachicly.)