Can you suggest please : One single Datasource for Multiple server

My powershell script in the datasource box is like below

Invoke command  - computername Server1 - scriptblock { Logic to Size of folder = x } 

Invoke command  - computername Server2  - scriptblock { Logic to Size of folder = y } 

Invoke command  - computername Server3 - scriptblock { Logic to Size of folder = z } 

So each script output is like eg:   X= 20

Data points collecting key value pairs 

Datapoint1 =x..... Datapoint2=y and Datapoint3=z

My Requirement : Server1 should display only Datapoint1 Raw data and not other 2 data. 

Anything you could help or point me to? 

Thank you