I would only use the term "censorship" to refer to the prevention of speech based on its content. Content-neutral time, place, and manner restrictions aren't censorship according to the way I use the word, and neither is copyright protection.

Note that censorship isn't necessarily bad and restrictions on speech that aren't censorship aren't necessarily acceptable. The prohibition on child pornography is censorship but I support it, while I am opposed to IP law in its entirety.