typedef struct my_object_t {
        unsigned int my_integer;
} my_object_t;


typedef struct rlm_mymodule_t {
    ....
        my_object_t *my_objects;
} rlm_mymodule_t;

......

static const CONF_PARSER myobjects_config[] = {
  { "my-integer", PW_TYPE_INTEGER, offsetof(my_object_t,my_integer), NULL, NULL },
  { NULL, -1, 0, NULL, NULL }
};

static const CONF_PARSER module_config[] = {
  ....
  { "my-object", PW_TYPE_SUBSECTION, 0, NULL, (const void *) myobjects_config },
  { NULL, -1, 0, NULL, NULL }
};