I'd suggest to combine form and List (aka UserDefinedTable) module with a profile property.

• create a user profile property "salescontact", containing a code (name) of the sales person.
• on an internal page, add a form and List (FnL) module and set up fields:
  - SalesCode
  - Address
• go to target page and use "copy exisiting module" in control panel to create a reference to existing FnL module
• setup rendering of the sales data appropriately (e.g. address only)
• enter a filter statement "[profile:salescontact] = [SalesCode]"

I have done everything that you said. Yet i am having the hardest time testing to see if it work... the module does not show nothing.