I need to update two domains using the ddns client included with DDWRT. What is the syntax for hostname field to update multiple domains with the new dynamically assigned IP address?
I've tried these three but I am not see a response showing the second domain being updated.

domain1 domain2
domain1,domain2
domain1;domain2

I found the setting. The hostname setting in DDWRT would be:

domain1 -a domain2

Confirmed working using the MD5 hash of the DDNS password and username to authenticate.