I think I found a solution to this problem and I will post it here for discussion. The solution that mayurnagda seems more eloquent if it's a solution.
Purpose, allow any user to submit to a more secured form library using DBXL:
1. Create a new Permission Access Level (DBXLSystemuse)
Give acces to, Add Items, Edit Items, Delete Items, View Items and Approve Items in List Permissions. These seem to be the minimal set necessary for DBXL to perform the auto delete and additions of your forms under the users' account.
If you don't give the user, "View Application Pages" right, they won't be able to open the page to that library. They will get an Access Denied, eventhough they have rights to add, edit and deletes to the list.
2. Create a new Group with users list using the new Permission Access Level(DBXLUsers)
3. Break inheritance for the Form Library you need secured, add DBXLUsers to this list as well as your administrator's group.
In Addition, if you are using form workflow with a configuration file as a Sharepoint list as suggested by Qdabra webinar; the mininal permission configuration is:
Do the same as above, but give acces as follow: View Items, View Versions, Create Alerts and View Applications
The above access rights will allow the form to read the configuration file and wont allow the user to edit/delete.
The result will allow a more secure form list while allowing DBXL to perform its automatic form additions and deletions. The user won't beable to see the link to the secure form and if they go to it directly will receive an access denied error page.
If anyone has a better idea to accomplish that, please chime in.