Setup:
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info_teleport_destinations:
Name: teleport_dest0X [X is 1-4].

trigger_teleport:
Name: teleport00
Start Disabled: No
Remote Destination: teleport_dest01
(Flags): "Clients" is checked

logic_case:
Name: case_00
Case 01 : 1
Case 02 : 2
Case 03 : 3
Case 04 : 4

I/O:
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teleport00:
OnStartTouch > case_00 > PickRandom

case_00:
OnCase01 > teleport00 > AddOutput > target teleport_dest01
OnCase02 > teleport00 > AddOutput > target teleport_dest02
OnCase03 > teleport00 > AddOutput > target teleport_dest03
OnCase04 > teleport00 > AddOutput > target teleport_dest04

Operation:
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When you touch the trigger_teleport, the logic_case is targeted and one of the OnCase0X outputs fires at random. Each OnCase0X output changes the remote destination of the teleporter.

Extras:
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You can determine what fields AddOutput has access to by creating an entity, populating all fields, and executing "ent_du