Get Connection With Specific SQL Database for different user

Question

Hi,

 

Please Help Me to resolve my probelms 

 

I have a LMS (Leads Mangement System) Panel for clients  with different Domain where each domain have individuals database.

I want to all our clients login with a single domain (were all domain database connected with one domain ) but here problem is one how to user login with own unique id and password and get only own company data.

 

Ex: company name : abc and  users id statrt with ABC001,ABC002....

      company name : xyz and users id statrt with XYZ001,XYZ002.... 

 

 

Evere abc, and xyz is use same panel but it all have individuals data for own comapny .

 

Advance Thanks