To be clear, they simply refer to "Mrs Lynch".
I'm going to look for the rest of the captures to see if there is more information about her identity.
Another interesting message:
They aren't happy with Clinton, either.
I haven't found anything additional. This is a bit sketchy without the additional context.
"Mrs Lynch" could be anyone. But, Elzie is documented as meeting with AG Lynch in the past:
And, here is a picture of Elzie posing with AG Lynch earlier this year:
Frankly, this is worth an investigation by Congress. If the AG is even peripherally involved in an attempt to disrupt the conventions, impeachment proceedings should be started immediately.