Yes, you can apply to multiple waiting lists.
You can apply apply anywhere in the country, and there is no limit on how many waiting lists or housing programs you can apply to. However, duplicate applications for the same waiting list may be terminated.
It is important to keep a record of all waiting lists you apply to. Not only is it good for your own general knowledge, but also if you need to update application information or find out your waiting list status. If the housing office gives you a confirmation number, keep that information as well.