It isn't always easy to find out a person's "industry" unless they are willing to tell you. I have been going since 2004 and I can think of a few people I know who don't talk about their websites and I don't ask them. Sometimes it isn't being evasive at all -- we are busy discussing SEO or affiliate marketing, not our own sites or occupations.
I looked at your LinkedIn profile and wasn't sure if you meant finding other SEOs who are in your company's industry, or whether you meant in-house SEOs (like me), or just SEOs (which would be a large part of the audience).
The first group would be easier to find on LinkedIn.
To find in-house SEOs, come to the first session after the first keynote. I imagine that the audience will largely consist of kindred spirits.
As for meeting someone in the SEO industry, you will meet people who are just learning about SEO, to experienced pros and the occasional celebrity.