The backup contains the hostname, IP address, default gateway and other networking information. There is no provision to change they while loading the backup.
You could potentially load the backup, connect to the web interface and then make the changes you desired. (Be careful to load the backup on an isolated network so it does not interfere with the ORIGINAL server, if that server is still live! The machine you are using to connect to the web interface with would also have to be able to route to the server you are loading the backup into, and not accidentally be routed to the original server.)