You are still misunderstanding.

Damage Dealt is not locked. The Damage Value is locked. While the initial value for Damage Dealt is equal to the Damage Value, Damage Dealt can then be further modified-- by critical hits, damage reducers, and other powers and game effects.

You have it pretty correct with:
Damage Dealt = Damage Value + Modifiers

However, I think more completely, it is:
Final Damage Dealt = (Printed Damage Value +/- Modifiers) + (Damage Dealt Modifiers)

Examples of (Printed Damage Value +/- Modifiers) are DV + Perplex or a locked Damage Value.

Examples of (Damage Dealt Modifiers) would be a Critical Hit or another effect like the 3D Soda Machine.

A damage value of 6, +3 (perplex modifiers) = 9 + Critical Hit = 10, since the critical hit, is not a modifier to damage value, but the damage dealt, it could increase by more than 3, the original damage value, is true this?

To be fair, Damage Value vs Damage Dealt is a concept that escapes even seasoned players, in my experience.

This is very true, there should be a diagram of how it is calculated the damage, and in which moment, you add the replacement values​​, modifying, critical hits, or any other game effect, and in which moment becomes the damage dealt

No. You roll a critical hit, you add 1.

You can't ever add more than that for a critical hit, and you cant ever critical hit more than once per attack roll, so you have no more to stack.

but the value is 9 (Original + modifiers) + 1 (C Hit) = 10
the Critical Hit, applies to damage dealt

Correct: the damage value is limited by the Rule of Three, but since the Critical Hit modifier applies to the damage dealt it is not part of that calculation.

Not a diagram, but the rule book does spell it out step by step:

DEALING DAMAGE
When an attack hits, the damage dealt to the target is equal to the attacker’s Damage Value, modified by any game effects. The target takes that much damage, modified by any game effects. The target’s combat dial is turned clockwise a number of times equal to the damage taken. Unless specified otherwise, effects that would increase damage dealt are calculated before effects that would decrease damage dealt. If multiple game effects would allow for damage dealt to a character to be reduced or ignored, only one game effect can activate, to be decided by the character’s controlling player. If damage dealt is reduced to 0, then the target is not damaged. Damage dealt cannot be reduced below 0. Game effects that reference the amount of damage a character has been dealt use the damage dealt value after all modifiers have been applied to it.

GSX Domino can.

To date I can't think of any others, but that doesn't mean we couldn't see another.

I think you misunderstand his meaning. He was simply asking if Critical Hits are restricted by the normal Rule of Three-- and the answer to that is "No, they are not."

If Galactus at 300 points is adjacent to four friendly figures with Enhancement, his damage value is 6+3=9, because of the Rule of Three. Normally, Galactus would not be able to deal 10 damage. However, if Galactus rolls a Critical Hit, he would deal his damage value plus one, or (6+3)+1=10.

Another example: if Non's damage was perplexed up by 1, then he made an attack with the Soda Machine which resulted in a Critical Hit, and Non rolled a 6 for the Ground Zero BFC, his total damage dealt would be: (4+3)+4=11.

I have the worst luck with Domino. Everytime I roll a critical hit with her, my opponent gets his Super Sense or Impervious roll. Even if the character didn't have the power in question. : - )

idk if this example is right (im too noob for this yet) character perplexed by +1 attackin with soda machine on close combat, get double sixs

This means (4 + 3) + 2 = 9 ?? on the damage dealt to the opponent?

Assuming that character has a printed Damage Value of 4, yes, you are correct.

That's funny.