Originally Posted by Eastbay1K
Yes, but the Immigration officer marks the customs form with what the customs officer is likely going to do to you. This doesn't mean that customs won't do more, but it is pretty consistent.
To add to this, from my fairly recent experience - if the immigration officer doesn't put any mark at all on your customs form, you are going to secondary, and can expect some questions because the customs people won't know exactly why you're supposed to be there.
On the original topic, Australia is one country that will definitely ask questions when a citizen reenters the country, although I probably get more of this because I don't actually live there these days. My wife is a US citizen, and previously when we lived in a country that was neither the US or Australia, she would get more questions entering the US than I would, and I would get more questions entering Australia than she would.