Hi,
I can think of a solution:
- You could do that by using tokens and tokens persistence.
- As per the camera, you could use a file upload question.
- As per the signature, you could use this plugin:
www.encuesta.biz/en/producto/limesurvey-signature/
- As per having different questions (extra questions) depending on who is entering, there are sme workaround, which depends on the UI you will be using to handle the whole process.
I would start with a PoC and later link all pieces by building some UI that makes the process easy to go.
If you need any help with that, please just drop me a line at gabriel@encuesta.biz.
PS: I know Dennis has some plugins for re-entering, but honestly not sure how to use them or how much they will cover. Still, worth checking as his plugins are great.