Hello @micaiahwebb,
Welcome to the Klaviyo Community!
Are these two forms Klaviyo built sign-up forms or are they the Shopify theme provided forms?
If they’re Klaviyo built sign-up forms, you’ll be able to edit the list they’re subscribing members to by making the edit on the form’s button. Checkout @retention’s answer in the Community post below which highlights this:
If they were Shopify forms though, you can accomplish something similar by working alongside a developer and redirecting those subscribers to the desired Klaviyo list. By default, as part of the Klaviyo x Shopify integration, you’re only able to designate a single list for users to be subscribed to as detailed in our About sign-up forms with Shopify subsection of the Getting started with Shopify Help Center article.
In my opinion, it may be easier to replace your member’s only sign-up form with a Klaviyo built one. This way you can directly distinguish subscribers from different sources.
I hope this helps!
David