How to compare values from two differing forms for specific users

How to compare values from two differing forms for specific users

Lookups are the main way, as I understand it, to draw values from one form to another. However, there are other times when other kinds of fields hold data that would be useful to link data across forms.  For example, take the following  forms and values:

UsersForm

Name     EmailID                Organization     
Sam     sam@xyz.com       xyz                  
Sally     sally@abc.com      abc

SystemsForm

System_Name          Organization
UIO                               xyz
IIO                                 abc
PAA                              xyz

The question would be how to filter a view based on the SystemsForm such that the current user (defined by zoho.loginuserid) only sees SystemForm records for that user's organization.  Thus for Sam, how does one capture the value of Organization based on his zoho.loginuserid compared with EmailID, so that one can filter out other organizations from SystemsForm. UIO and PAA would be the ones showing.