Yes, although we'd recommend against it! You should always use a single contact list split into segments (you can have as many segments as you need ;).
If you'd still like to send your campaign to more than one list at the same time, just select "More than one" under "Nr of lists" on the campaign deployment page and select the lists you intend to mail.
However, do be sure that:
- your campaign has no advanced personalisation (ie. contents which change dynamically for each contact).
- the lists you select have no duplicated contacts (they'll receive the campaign more than once otherwise!).
When you confirm your send, E-goi will send out a separate, cloned campaign for each list you've chosen.