CCR1016-12G: Binding outgoing Traffic form a specific client on a specific WAN Interface

RouterOS Forwarding Protocols
1

Hello all together,

can anybody tell me how can i set the NAT rule, to bind an outgoinig connection from an specific client on a specific outgoing wan interface i.E. 192.168.1.10 outgoing only over WAN2?
The incoming PortFwd. runs without any problems, but the outgoing doesnt (chain:scrnat, srcadr: 192.168.1.10, Out. Interface: WAN2, Action: masquerade).

Thank you for your support.

Johannes