Finding duplicate values in Title column in a user specific view through object model

Hi,

My requirement is:

I compare the items in 2 list and create the items which are matching.

so for single item there may be chances of more items match and thus create a duplicate items. but that is ok as the items will be created by different users and the view is filtered to [Created By]=me.

my requirement is that, for the same user no duplicate items should be visible in his view.

any way that i can check, whether the user has already has the item visible in his view and if so i can avoide adding it again?

Aruna