Hi Mohin,
You could try something like this:
access-list nat_for_tunnel_x permit ip host 10.10.10.10
static (inside,outside) 192.169.1.10 access-list nat_for_tunnel_x
access-list nat_for_tunnel_y permit ip host 10.10.10.10
static (inside,outside) 172.18.1.10 access-list nat_for_tunnel_y
So we basically created two static policy NAT rules, which do the nat keeping in mind which network the server would be communicating with.
Hope this helps.
-Shrikant
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