you can use "Hide"
you add all the logos to the page but by default their initial status are"hide"
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Image1.visible = true
or
Image1.Visible = False
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and then after the user login, a very simple if command will do,
of you can create a method that gets the user company name and then enable the specific photo or photos!!!
for example:
if usercompanyname == "IBM" then
Image1.visible = true
else
End if
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if you want to get the pic from database ,, you can use the image from the standards tool box and change it accordingly when a user logs in !!