Yes, we encourage it!
Select the first person you want to introduce by going to your People tab (bottom left icon), and navigating to his/her profile. Next, tap the (...) button at top right of the profile screen. This will display a list of options. Select the option "Introduce Hio Contacts." Then select the person you want to introduce your friend to and continue. Customize the introduction with a few comments (or simply use the pre-populated message) and send.
Voila! You are a networking introduction master!