How to divide sip user on Brekeke sip server

[Mr Tho]

1. Brekeke Product Name and Version:
Brekeke SIP server 3.5.x
2. Java version:
1.9
3. OS type and the version:
Centos 6.5
4. UA (phone), gateway or other hardware/software involved:
Sip phone
5. Your problem:
As you know with Sip server. Brekeke don't have multi-tenant.
So from any SIp user can call to other Sip user.
But i would like to divide many group.
Example: Group 1: include Sip user: 100, 101, 102, 103
Group 2: include Sip user: 104, 105, 106, 107
all user in group 1 can call each other. But can not call any user in group 2.
all user in group 2 can call each other. But can not call any user in group 1.

Please give me some advice. How to set on dial plan. Because Sip server don't use ARS.

Thanks !

[ambrosio]

Use "Multiple Domains" mode in Brekeke SIP Server. It meets the requirements.