You can save data from InDesign form elements using in5 (assuming the computer, user, and browser remain the same).
You can save data from the following InDesign form elements:
- Radio Buttons
- Text inputs (single- and multi-line).
- Selection Lists
You create the form elements using the Buttons & Forms panel (Window > Interactive).
To tell in5 that you want to save the data, use the Form Element Data panel (in5 > Interactive Widgets).
The process is shown in the video below.
To store data beyond the user's browser, see How to Include a Submittable Form in Your InDesign Document.