Look into using the bp_after_has_members_parse_args filter. I think it’ll let you override the meta_key and meta_value params. That may help you do what you want?

See here for a tutorial on how to use the filter.

You can use the following to do that.

bp_member_profile_data( 'field=the field name' );

Be sure to replace the field name with your actual profile field name. Also note it must be used within the members loop.

You’ll need to modify your members template. Check out the BuddyPress Template Hierarchy for more info on the template system.

To show a specific profile field inside the loop, you can just do: bp_member_profile_data( 'field=the field name' );