Is it possible to track information of customers who is using particular modules?

I just get started with OpenMRS. My goal is to develop a custom module in OpenMRS. If I managed to develop a custom module and added it to the index page, Is it possible to track information of customers who are using particular modules? or the customer information at the system level.

Using this information, We like to send feedback surveys to customers. Is this allowed possible/allowed in OpenMRS policy?