Can we use this as one on one support chat?

We are considering to start a weekly 2 hour long chat session on one of our site in a multisite setup. I was wondering if we could use this chat plugin for that matter.

Here is what is required.

- one-on-one chat so every chat request is being done in its own private window and not on a chat wall.

- Moderation for the questions so guest could only see/answer the questions approved by moderator.

- Public could ask questions without having to login to the site. (On a separate note, this plugin comes with social login features. Do they get the user register for the site or only provide access to the chat window?)

- How resource intensive it would be for rest of the network?
Let me know how much is possible?