Hi @BRyder,
You can use user permissions, especially the contact access permissions, to limit who can see contacts, companies, deals etc: HubSpot user permissions guide
These permissions are based on the owner of a record. If you have a commercial form, all contacts would have to be assigned to or rotated among the commercial team. Everyone on the commercial team would have to have “team only” contact access permissions. Government team users could not see these contacts if their permissions are also set to “team only”.
With HubSpot’s new feature that lets you log in as another user (if you’re an admin), you can check whether this works as espected: Log in as another HubSpot user
That leaves the question of the website and the forms. You have two options here:
(1) If you want to keep using the same form for both business lines, contacts would have to self-identify in the form, as either a commercial or government contact. You wouldn’t have to call it like that in the form but there would have to be a way for you to separate these contacts.
(2) Or you create multiple forms, much easier. One form for government pages, one form for commercial pages.
In both cases, you would then leverage workflows to automatically assign contacts to the correct contact owners. (In scenario (1), this workflow would enroll contacts who submitted the form and if/then branch based on the self-identification. In scenario (2), you would branch based on whether the commercial or the government form were submitted.) When a contact submits a form, they would be assigned to an owner and only be visible to their team, see above.
There is also a business units feature which might be interesting for you. I’d recommend talking to your account manager whether this is a good fit or not, this involves additional considerations.
This is a potentially very big topic, let me know if you have any follow-up questions!
Hope this helps!