Поръчайте версии като номера

Можете да използвате regexp_substr() :

order by fname,
         cast(regexp_substr(version, '[^.]+', 1, 1) as number),
         cast(regexp_substr(version, '[^.]+', 1, 2) as number),
         cast(regexp_substr(version, '[^.]+', 1, 3) as number)