Selecting Multiple users on UI side in Data View

Hi Experts , I have one scenario in that I need to select multiple users for sending circular or any other messages.For that what I have to add.Is there any widgets for that.Here I have attached my requirement for your reference. In the bellow image I need to select multiple users in SentTo input label. Thanks in Advance.
1 answers

See the documenation about the reference selector: 

You can select user, using a page instead of the drop-down. If the association you are selecting over is setup correcty, for example 1 Message – * users or *-*,  then you can select multipe users with the page.