Hi @ATZSUMIT ,

Following are the variables you can use to fetch data for a data source.

 

 Lobbies are designed to provide a summary of the information .As per my understanding, you cannot get user inputs in the lobby screen and usage of the above variables will determine the data fetched to the elements. 

 

In the above snip, the logged in user is ADMIN (extracted by the variable #User_Id#), therefore all the request which has the person_id_owner as ADMIN will be fetched.

Hope this answer helps.

Best Regards,
Atheeq

Hi @ATZSUMIT ,

Yes it is possible.
Example - task list 

Make sure your datasource contains user input variables. Like, place_id_cust = '$place_id_cust$'

Nothing special to do with the element designer

Just create a lobby page and add your list. Click on the drop down of lobby page title. Which will show input field to enter the user input.
Initially you do not see any values

BUT, when you enter the place id, list show the relevant data in your list (Click on the drop down arrow near lobby page name C_DEMO_LOBBBY_PAGE and enter the input)

Regards,
Sanjeewa