Hi Vikram -
What specific tables are you working with? As far as I know, none of the Tableau-blessed views contain a field named "Group" or "Group Name". What version of Tableau Server are you working on?
First, apologies for the delayed response.
I realized that these names were connections names.
However, i was able to get the desired output i needed to bring the Group Name and their corresponding users.
I used the following tables to achieve this, 'users','group_users','group'