I need a custom lookup field from the originator

Does the column in the other list have the list of NT Accounts? Or are you talking about creating a list with a field having the NT Accounts?

yes to your first question.  I need to know how the sharepoint originator code uses id;#preferredname to link to his user profile?  preferred name is usually not unique, but with id, it seems to link to UserProfile perfect.  just click on a created by and u will see what i mean.  I may be asking too much here.  thanks anyways.

well, you helped a lot.  to continue, i have a list of email addresses grouped by user names with each user name encompassing 3 different email addresses.  unfortunately, i cannot change the view to filter on user names, as the [me] in the filter will not accept user names, but names that are in the created by.  if you look at who createdby encompasses, you will see that i need to create this 3 times for each user.  not an easy task, but i have been able to do it for several users.  i have many users.  how do i retrieve these codes.  the reason i need this, is i use the user name per say to populate a lookup field of emails on another list per user.  in this case, i use the filter on [me] to bring up the exact rows.

I'm curious where you learned about the id's?