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 "Mail duplicate contacts only once" option is on. You can find it in the "Advanced" options of your campaign "Setup".
When you confirm your send, E-goi will send out a separate, cloned campaign for each list you've chosen.