Welcome Juho 
I’d say yes to an extent. However, at the moment only signed up users can use it. So an anonymous user wouldn’t be able to access it for support.
I don’t think that is currently possible with the current settings
Settings
chat allowed groups
&
direct message enabled groups
My solution isn’t the best but I would create a group that can send chats and another that does not have access to chats. This way you can trust members to send chats to certain people only? And if they don’t, add them to the not allowed access group. If anyone has any better ideas I’m all ears 
This is not currently a feature. You’d need some custom plugin.