Thank you for your response Jim! Your misunderstanding prompted me to check it again - and now it works! It's definitely not worked before, and I do not understand how he could miss this news.
What I doing (again, for history):
To my MC server "MC-server" (10.0.0.1:9999) is connected a MC client ("MC-client"), which is configured zone "My main client zone". To control this area with Tremote, this MC-client is also configured as server (10.0.0.2:8888), to which I connect a third copy of the MC, installed on my umpc (MC-control). Earlier on this stage I received a message about can't connect to the server on MC-client. Now the "MC-control" is connected to "MC-client" and allows to control a zone "My main client zone" from umpc.
Profit )
I waited for this functionality since the announcement function Tremote. Thank you for implementation.