Multiple DCAs per table

Hi all,
Just wondering if there's a solution to having more than one backend module use a database table?
Ie I'm after adding a secondary DCA for the tl_member table so that a certain user group can only see a certain class of member.

This is so that we can apply an automatic filter on one backend module to only so members which a certain attribute and then to provide an additional operation that can only be performed on these members.
The member type in question is for our organisations, so that the additional operation of 'view jobs' can be created.

Cheers