L2TP/IPsec client routing through specific interface in dual WAN system

Just add this rule : replace X.X.X.X with ipsec client ip address
/ip r rule add src-address=X.X.X.X table=markforl2tp action=lookup
/ip fi nat add chain=srcnat src-address=X.X.X.X action=masquerade out-interface=lte2 place-before=0