Logical servername / dns name

Hi,

can we specify the logical servername to be different from the dns name to which we connect somewhere ?

I.e. during development we have a server 192.168.0.1 which hosts a domain like xyz.de … so we want to connect to server 192.168.0.1:5222 with server name being xyz.de and my jid is uls@xyz.de

Is there a pointer to some part of the documentation somewhere ?

Thanks in advance,

Ulrich