Q. Will I need to purchase a license in order to do multiple site submissions?
You don't need to purchase a license for multiple site submissions. Number of domains you can submit depends on the version you purchase.
HOWEVER, If you want to use Dynamic Submission to provide submission services for their clients, you need to purchase the Enterprise Version to do so.
Dynamic Submission - Tutorials & Knowledge Base Resources for Dynamic Submission 7.0 Software
Dynamic Submission 7.0 Help Centre
You don't need to purchase a license for multiple site
submissions. Number of domains you can submit depends
on the version you purchase. 
