Hi,
Thank you for sharing your suggestion and use case.
We have recorded your feature request and submitted it to the relevant team for further discussion and evaluation.
However, you can try using source-based policy routing (ip rule ) to direct specific clients through a preferred WAN while keeping Multi-WAN in Failover mode.
You may refer to:
Please note that this is a manual workaround, and the configuration may need to be adjusted for your router and network setup.
Thank you for your feedback and support.