To get a list of e-mails and sms numbers that shared photos on the iPad, you'll need to log in to fotoshare.co/account/login. Log in with your LumaShare email and password. You'll also be able to see all shares from dslrBooth/lumaBooth as well at fotoshare.co.
After registering/logging in, go to Events > Select your event > Shares.
If you're not seeing your shares from the iPad on fotoShare, most likely you didn't log in to fotoShare.co with the same email address you use in LumaShare app. This will affect all future shares. If you have previous shares that are missing, contact our support team, and let us know your FotoShare cloud email.