You can make a basic GUI Extension for your components (there are some guides to do this)

Then in the js of your extension the code that you need could be something like that:

if (Tridion.UI.UserSettings.getJsonUserSettings(true).User.Data.GroupMemberships.Group) 
{
  if (Tridion.UI.UserSettings.getJsonUserSettings(true).User.Data.GroupMemberships.Group["@title"].toString().indexOf(YOUR_SECURITY_GROUP) == -1) {
     $display.getView().properties.controls.TabControl.disableItem(2)
  }
}

The line :

$display.getView().properties.controls.TabControl.disableItem(2)

Turns the source tab (with index 2) disabled.

You can make a basic GUI Extension for your components (there are some guides to do this)

Then in the js of your extension the code that you need could be something like that:

    if (Tridion.UI.UserSettings.getJsonUserSettings(true).User.Data.GroupMemberships.Group) 
    {
      if (Tridion.UI.UserSettings.getJsonUserSettings(true).User.Data.GroupMemberships.Group["@title"].toString().indexOf(YOUR_SECURITY_GROUP) == -1) {
         $display.getView().properties.controls.TabControl.disableItem(2)
      }
    }else{ 
      $display.getView().properties.controls.TabControl.disableItem(2)
    }

The line :

$display.getView().properties.controls.TabControl.disableItem(2)

Turns the source tab (with index 2) disabled.