Yes m8!  JimmyChitwood hooked me up with this info on discord...  If you go to settings for your vps you can add up to 3 total ipv4 addresses per vps!  I'm just now configuring mine as well.  After you add the IP addresses, you most likely need to manually edit your network configuration file (e.g., /etc/network/interfaces) and then hard reboot the server from vultr.com.  Theoretically, you don't have to modify any settings server side b/c you just added IP addresses.  I can't confirm this yet, but have faith in JimmyChitwood, and will be able to confirm it shortly