Hey, great question and welcome to the community!

Here’s one way I do that with my forms:

On the form, you can collect custom properties as a hidden field.  For example, in this form, I created a Source property to equal SMS Collect.

When someone signs up using this form, you can see that property in their profile

To segment based on which forms, you can now create a segment based on the respective custom property you set. 

Hope that helps!

Hi @twiggpuzzles,

I think you would find great success following @Mailbox Manny’s strategy! Adding hidden fields and then segmenting through $source would be a good way to distinguish where your users are coming from. I would just like to add some supplemental reading from our Help Center below!
How to Create and Manage Signup Forms

How to Segment for Form Results

Have a good day!
Alex