Yes you can. But only if you are at the PRO tariff. There are two kinds of moderators in Tolstoy Comments: public (without access to the administration panel) and regular (with limited access to the administration panel and ability to ban users).
Read in our blog about what is the difference between public and regular commentators, other pitfalls and how not to screw up when the moderators start banning all your community.
You can add more moderators via the Users section of the administration panel (p.1). Of course the user who is intended to become a moderator, should be registered in the widget. Find him or her in this list, click three dots and choose «User’s capacities». Appoint the needed capacity and do not forget to save changes (p.3).