Can i do it
I have 1 Server 2 interfaces
Can i do it update interfaces 1 to grup 1 ?
Can i do it update interfaces 2 to grup 2 ?

The Dynu IP update client does not support updating IP address for two different groups. However, you can use Dynu IP update client to update the IP address for 1 group. For the 2nd group, you can use another IP update client software such as DDClient. This will allow you to update the IP address for both WANs.