Take a look here : Form Data Binder
actually you have to navigate to your DataList Builder -> Source and set your Binder to "Form Data binder".
Fill out the "Extra Conditions" field you may use for example:
e.customProperties.username='currentUser.username'
or much easier you could use the "Advance Form Data binder" which does the same some visually as seen below..

Now you can publish your Datalist, don't forget to arrange the "permission" section of your "Userview" acording to your new Datalist filter.
....hope it makes sense:)