Yes you can as long as you don't go over the 100 count for clients.
This article explains it:
http://www.symantec.com/docs/HOWTO80852
"License coverage: sites and domains
A Symantec Endpoint Protection product license is applied to an entire installation regardless of the number of replicated sites or domains that compose the installation. For instance, a license for 100 seats covers a two-site installation where each site has 50 seats.
If you have not implemented replication, you may deploy the same .slf file to multiple Symantec Endpoint Protection management servers. The number of clients reporting to your management servers must not exceed the total number of licensed seats."