Is there a way to set up Portals so there can be different 'users'.

So they can have an Leads access that can only be accessed by one email login (sales team), but can still convert Leads to Deals so other people in the office with a different login can see the Deals that are converted? 

The only other way I can see is to set up a separate Portal User Type that only has Leads, and another one that only has Deals and the user has to enter the data from Leads into the second account's Deals module.