So, it appears I would have to edit the wp-config file to select the correct database, if each project were on a unique subdomain.
The code looks something like:
$host = $_SERVER['HTTP_HOST'];
$parts = explode('.',$host);
if ($parts[3] = "") {
$domain = $parts[0];
} else {
$domain = $parts[1];
}
switch ($domain) {
case "domain1":
$db = "database1";
break;
case "domain2":
$db = "database2";
break;
}
define('DB_NAME', $db);
define('DB_USER', 'user');
define('DB_PASSWORD', 'password');
define('DB_HOST', 'hostname');
Taken from here.