Hi Faisal,

Well I would suggest to do the following based on the requested scenario:

Public user Registration Form:

1- Create a Form for public user registration with required fields & info where user can submit info

2- Create external DB table for public users as submitters with required fields & info

3- Save the data into the external table (user name, password, credentials, email, mobile, full name, etc...)

through WF custom SQL

4- Return successful registration email

5- Close the Process

Public User Logon Form or Tap:

1- Create a form to Get the user credentials (user name & password) from the external DB into a token

2- Create a condition based into the token validation if true (user is exist) to redirect for desired or required service list option list field or form (from condition & WF condition) 

Public Service Form (desired or required service)

1- Create service(s) form required

2- Based on User service selection required route or call the form of required services from forms (open new link) or WF (open form activity) in this part you need to put all your forms routing or call conditions 

3- Close the process with an email notification 

hope above explain it the logical steps & if technical can be highlighted where exactly the issue, however you can't create submitter public user into the console from forms into Laserfiche admin console

hope above could help your objectives

B.R.

Hisham