Yes. You can have as many HTML Web Signup forms on a webpage as you want. In order to have multiple HTML forms,

Browse to the Form and Email Design Wizard by selecting the Web Signup Forms Option from the Lists Menu.

Select the Create HTML Embed Form from the Resources Drop down.

Design and modify the form as you see fit. 

Copy the code in the Copy/Paste code to your site section and paste it into your website

That will create a single signup form. To create another simply make modifications to the form. You can also paste the same sign-up form code multiple times into the same website.