How would i make a Skip elseif do Teleport?

Let's break your problem into some steps:

1. Add a .Touched connection to X part for players who will not be teleported

2. Affect the status of this player's teleportation

3. Teleport all players who's status remains unchanged

We can use dictionaries to make our task easier

Part 1:

local exempt = YourXPartHere 
local players = game:GetService("Players")

exempt.Touched:Connect(function(part)
    if players:GetPlayerFromCharacter(part.Parent) then
        -- Change status
    end
end)

Part 2: Since we need to change the status of teleportation and it needs to be linked to the actual teleport part, we'll come back to this after 3

Part 3:

local part = workspace.ForceTele

local function Teleport(list)
    for i,v in next, list do 
        local chr = v.Character 
        if chr and chr:FindFirstChild("HumanoidRootPart") then  
            chr:SetPrimaryPartCFrame(part.CFrame) 
        end
    end
end

Now, we need to make list exclude all our exempted players, so we make a dictionary for that:

local excluded = {}

Incorporate excluded into the .touched connection:

local excluded = {}
local exempt = YourXPartHere 
local players = game:GetService("Players")

exempt.Touched:Connect(function(part)
    local player = players:GetPlayerFromCharacter(part.Parent)
    if player and not excluded[player] then
        -- Change status
        excluded[player] = true
    end
end)

And finally we update our list:

local function GetList()
    local players = game.Playere:GetPlayers()
    for index, player in pairs(players) do
        if excluded[player] then
            players[index] = nil
        end
    end
    return players
end)

Our final functioning script:

local excluded = {}
local exempt = YourXPartHere 
local players = game:GetService("Players")
local part = workspace.ForceTele

exempt.Touched:Connect(function(part)
    local player = players:GetPlayerFromCharacter(part.Parent)
    if player and not excluded[player] then
        excluded[player] = true
    end
end)

local function GetList()
    local players = game.Players:GetPlayers()
    for index, player in pairs(players) do
        if excluded[player] then
            players[index] = nil
        end
    end
    return players
end)

local function Teleport(list)
    for i,v in next, list do 
        local chr = v.Character 
        if chr and chr:FindFirstChild("HumanoidRootPart") then  
            chr:SetPrimaryPartCFrame(part.CFrame) 
        end
    end
end

-- Wherever you need to teleport 
Teleport(GetList())

That's the basic structure of the script, you just need to know how to implement it (call what when where) Excuse the explanation, I'm a bit annoyed on phone and didn't use a lot of markup. Feel free to point out any mistake or ask a question in the comments!

Give the players a bool value called "TouchedPart". When the part is touched a script inside of it will make TouchedPart true on the player. The script will look like this

script.Parent.Touched:Connect(function(hit)
    local plrName = hit.Parent.Name
    pcall(function() --Just in case something else that's not a player touches the block
        game.Players[plrName].TouchedPart.Value = true
    end)
end)

Then when it is time to teleport, for every player in the game, if they do not have that value as true, then teleport them.

Hope this helps!