unicast

1. Admin console can not discover domains automatically and I should Manually join and leave domains. I mean I should active Preferences>Domains>"Manually join and leave domains" and I should give it domainId and click on "join Domains".
2. Admin console will not open and can not show domains if all initial_peers that set in admin console xml are not connected. In xml that I showed, admin console will not open if my pc is not connected to "192.168.12.5" ip.

I have four hosts called A, B, C, D.

A has IP Address 192.168.0.97.
B has IP Address 192.168.0.99.
C has IP Address 192.168.0.98.
D has IP Address 192.168.0.99.

A and B are connected to each other through an ethernet switch S1.
C and D are connected to each other through an ethernet switch S2.
S1 and S2 are not connected to one another.

Hello, I'd like to if DDS can to support the following scenario: I'd like to use the same DataWriter to send data to specific participant, but each time to a different participant. This is essentially unicast. 

Thanks,

Zach.