src-nat setup using flow-mark or conn-mark

RouterOS General
1

Dear All,
Is there any example on setting up src-nat without directly defining the src-addr to be nated but using flow-mark or conn-mark ?

I have 2 ISP connection, i’ve to make a src-nat specific to request-packet destinations.

sincerely
-bino-

2 
/ip firewall mangle add dst-address=10.10.10.0/24 mark-flow=abcd
/ip firewall src-nat add flow=abcd action=masquerade