Hi
You need to define User Roles. Go to Tools->User Roles and define a roles .
Then, you can add conditional formatting to display the view in a different
color based on the user role. You can also use the user role to conditionally
hide or show a section in the form.To display an alert message you need to
write code on onload .

Signature
Madhuri Nishanker Rao
http://www.autonomysystems.com
> How can we restrict who can open a form saved in a sharepoint form library
> based on NT credentials (e.g.; Security group or Domain User)?
>
> Basically we only want the creator and a limited security group to have
> access to edit/view forms submitted. We want to present a dialog or message
> to any other users "You cannot view or modify this form".