Well I found the solution to display limited fields. Here it tells you a way to limit fields, but it was more than I needed:
http://sprox.org/tutorials/table.html
What I did was set the tmpl_context.widget to my user table class instance. And then set a variable with my filler class instance and used get_value(user_name = 'somethingHere'). Instead of 'user_name' you could use other attributes of your DB object like user_id which was the primary key for my User DB. To get my user object I used 'request.identity['user']' :
tmpl_context.widget = tUser_Table
fillerValue = tUser_Table_Value.get_value(user_name = currentUserObject.user_name)
Then in my template used:
${tmpl_context.widget(value=fillerValue)}