Is moderate drinking acceptable in Buddhism? I have heard a certain interpretation of the 5th precept and I'm curious about it, the person said that for lay people the 5th precept means "not drinking alcohol to the point you get intoxicated or lose control of your actions", therefore it would be ok to drink a glass of wine having dinner for instance. On the other hand, once you start drinking it becomes very hard to know your limits, most of the people don't have this ability.

Is there a limit or something regarding drinking alcohol according to Buddhism?
The application of the fifth precept is a matter of controversy even within specific traditions, so there is no simple yes/no answer to this question. 

The Tibetan tradition famously incorporates alcohol in the bi-monthly ceremony known as tsog (see Lama Thubten Yeshe's "What is Tsog?"). Lama Palden Drolma's opinion on the matter seems to summarize well the thinking in the Tibetan tradition:


  To refrain from taking intoxicants is one of the primary vows that
  laypeople may take and that monastics have to uphold. One of the main
  reasons for not becoming intoxicated is that this can—and often does—
  lead to breaking other vows or straying from one’s integrity. Another
  reason for not becoming intoxicated is that for many, intoxication
  obscures the clarity of mind— the clarity to understand and rest in
  one’s true nature moment to moment. If one’s mind has stabilized in
  true nature to the extent that its clarity is never obscured, then it
  makes no difference whether one takes in substances or not.
  
  From the point of view of the dharma training I was given, it is
  permissible, even having taken this vow, as a layperson, to enjoy a
  glass of wine occasionally. A distinction is made between
  intoxication, where one’s clarity is compromised, and simply enjoying
  partaking of a substance. I also do not feel that occasionally
  utilizing a substance for transformational work is an obstacle to
  awakening. It may be helpful—but honest discernment and consultation
  is needed if one engages in this way, so that one does not fool
  oneself and go astray. [Source]