Yes, every business account has a unique URL that you can share with anyone and invite them to download the Drum Referrer App and promote on your behalf.
You can retrieve that unique URL by clicking "Learn More" on the banner from your account or by navigating to your account settings.
More information about starting your referral program can be found here.
There currently isn't a way in the app to limit your company's offers to specific referrers. Anyone will also be able to pass referrals on your behalf and help spread awareness of your brand and products/services.