I have an internet connection on WAN1 and on WAN2.

Is it possible to configure it so that:

Internet connection from WAN1 is used by only one computer on the network.
Internet connection from WAN2 is used by all other devices on the network.

When WAN2 goes down, all devices on the network use WAN1 as backup to connect to the internet.
Then when WAN2 comes back online, it reverts so that all devices except for one IP on the network, use WAN2 again for internet.

Is this possible?

Thanks

For the which client uses which WAN, that's fine - you'd use routing policy.
What happens when one fails I think is part of the policy too - you set
WAN1 only vs. WAN1 firstly.... sorry, not with a router now so this
is just a pointer

Thanks, it worked perfectly.