function SetTextTagVisibleWithCond takes texttag t, boolean b returns nothing
     call SetTextTagVisibility(t, b)
endfunction

//...
     call SetTextTagVisibleWithCond(t, GetLocalPlayer() == p)
//...

globals
     constant trigger udg_Trigger = CreateTrigger()
endglobals

function SetTextTagVisibleWithCond takes texttag t, code f returns nothing
     local triggercondition tc = TriggerAddCondition(udg_Trigger, Filter(f))
     call SetTextTagVisibility(t, TriggerEvalute(udg_Trigger))
     call TriggerRemoveCondition(udg_Trigger, tc)
     set tc = null
endfunction

//...

function VisCond takes nothing returns boolean
     return GetLocalPlayer() == udg_Player
endfunction

//...
     set udg_Player = p
     call SetTextTagVisibleWithCond(t, function VisCond)
//...