Are you meaning with the Symantec System Center?
Unfortunately with the Small Business Build of SEP 12.x you are quite limited in management of this type of environment.
With the SEP 11.x product it is possible to setup multiple SEPM servers and have replication, which would allow viewing of different SEPM locations and their respective clients from a single SEPM console.
In addition there is the remote SEPM console which can be utilized to access other SEPM consoles from a remote system, provided there is network connectivity between the system running the remote console and the system running the SEPM.
There is also a remote console for the Symantec Protection Center for SEPSBE 12.x.
The following document link will assist in assessing how to configure SEP 11.x for management of remote locations. It may be worth speaking with your sales person or vendor to see if you can modify your licensing agreement to get the SEP 11.x product.
http://www.symantec.com/business/support/index?page=content&id=TECH94122&locale=en_US
Regards.