On my computer I have two network cards. Both are using different Internet Providers service.Both Internet service provider have different DNS server and their IP address are known to me.I want to make sure when nslookup sends queries, it passes through exactly by specified interface.Something like:ping -I eth1 google.comnslookup -I eth1 google.com is possible by any way, I know there is no -I option, I even don't want it to be specific in that way only.How do I do it?  
Make nslookup use specific interface
dns;routing;dynamic dns