Multiple Subscriber Lists - Campaign Monitor

Yes, add multiple Campaign Monitor Feeds. One for each list and configure the Conditional so that it only happens if the user selects the specific checkmark that corresponds to that list.

Multiple recipients to add to the Mailing List? Currently no, it only adds one subscriber per Campaign Monitor Feed because it pulls from one Email field that you select. So one Feed won't add multiple recipients. From a spam perspective this is bad anyway, other people shouldn't be adding subscribers to your list... this is how you will get in trouble for spamming. Only that individual should be choosing to add themselves to your mailing list and they shouldn't be adding other people.

Multiple recipients for what? Notifications? Currently Notifications are only designed to go to one recipient. But you can use the BCC field to add an additional recipient using the form field merge codes which you can get using the "Insert form field" drop down on the Message body for Notifications. This inserts the merge code which you can then copy-n-paste into the BCC field.

To do this you could use the Routing feature of the Admin Notification Send To field. It allows you to send the notification to an email address based on a selection made in the form. It's an option on the Send To address for the Admin Notification. It uses selection fields (drop down, radio button, multiple choice fields) to let you set which email address the Admin Notification should be sent to based on the selection made in a field on your form.