The short answer is... it depends.
By default, QuotaGuard Static allows you to route outbound traffic from your app via a Static IP, for example, to access a database behind a firewall.
If you want to route inbound traffic via a static IP to your application, then you need to do a bit more configuration, and it comes with some caveats.
#1 - Creating a DNS record to point to a Heroku application
If you are doing this to try and setup DNS rules for your Heroku app (for example pointing myapp.com to your Heroku app) you should do this via a CNAME, not via an A record on the IP address.
You can find out more at this link about how to set up Inbound Proxies for your Heroku application.
#2 - Clients of your website have strict internal firewall controls and can only access websites with a specific IP address
If you have clients that can only access specific sites on the internet and you need a static IP address that they can add to their firewall then you can use QuotaGuard Static. Simply follow the instructions here to get started: http://support.quotaguard.com/solution/articles/5000633969
1. You cannot just enter in the Static IP address. Multiple accounts may be sharing the same IP address, so without using a hostname in your URL, we are unable to determine which account to route traffic to correctly.