There seem to me to be two different things. One is the penalties that the House itself can impose. If the House finds and can identify the person, it can bring that person before the bar of the House and find the person in contempt of Parliament. It can put them in jail. Jail, from time to time, has meant either the local municipal jail or a room in a hotel. The person with a jail sentence can continue to the end of the session. The other thing they can do is bring a member, even of the public, before the bar of the House—with the permission of the House, because there is a stranger there—and they can admonish and censure the person. That's it.
For a member of Parliament, you could go as far as you wanted to and declare the seat vacant if you wanted, but the House has a different power over citizens, non-members of the House, who have committed a breach of privilege.