You can publish to ONE Facebook page at a time, but you can choose between different business pages you are admin of.
When you're creating a campaign (Product Sale / Daily Deal / Auto-Pilot / Coupon) you can select the Facebook page you want the posts to be published on your Marketing Plan screen:
Share a Poster
If you are creating posters then you can select different Facebook pages before publishing it:
Here too you can create Queues for business pages that are associated with your Facebook account (used to create the Socioh account).