MySQL (with VB6) questions

Hey, I know this isn't exactly the correct forum for these questions, but I'm doing all this from VB6, so I thought I'd ask here anyway. And, I'm just most familiar with this forum.

Ok, we're setting up an interface to a MySQL database on a server within a WAN. Basically, the hookup is like this. We've got the MySQL server going ... we're hooked up to it via ODBC to MS-Access (MDB) files ... and then, we're opening those MDB files with a VB6 program for various manipulations. That's all just the details though.

Specifically, there are starting to be some questions about setting up some security/privacy protocols, and two questions have come up:

1) With MySQL, is there a way to allow someone write-only access? We'd like this so we can build an "upload" function via the ODBC so that several sites can "push" records into the MySQL tables without necessarily being able to query them.

2) When setting up various MySQL schemas, is it possible to get access permissions down to the "field/column" level? Or is it always limited to the "table" level?

I know there are some good DB people who float around this forum, so I appreciate you letting me ask about this here.

Best Regards,
Elroy