I have a network like this:
RB133 ROS 5.4
Wlan-interface with 10 clients → eth in a bridge
In the same bridge are two modems to different gateways (different isp) to Internet.
Normaly I have all clients routed to one of the modems/gateway.
How can I route one single client-IP of this 10 clients to the other modem/gateway?
First of i would suggest you drop the bridge and do pure routing. Of cause, this is mikrotik, so you don’t have to, but later on it will get extremely difficult to change to routing. Also have look at PCC load balancing, maybe a better option. That said, you would mark the data from the user with a connection mark then use the connection mark to mark a routing mark which you would route out the second modem. All of this is explained in PCC example. Give it a try.