Hi @chirantan.banerjee ,
Thanks for this information!
Can you please go to your Auth0 dashboard → Organizations → the specific organization for which you intend to enable database connection and under the Connections tab select the database connection?
I do not know details of your tenant setup, but this way you should be able isolate users (in terms of connection they log in from) between organizations (by enabling different connections for different organizations, like google connection for org1 and database connection for org2.)
https://auth0.com/docs/manage-users/organizations/configure-organizations/enable-connections