It is definitely possible to have many styles associated with a single layer. GeoServer doesn’t have a mechanism for selecting the style based on the current user, though. Typically this would be accomplished by having the client change the STYLES parameter in the GetMap request (for example, by modifying the configuration of the OpenLayers Layer object being used.)
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No is the short answer.
However, you could solve this problem programmatically by catching the
request and changing it according to the session_id/user_id or
leave it to the user to modify the &styles=xxxx part of the WMS request,
provided you have defined the different styles or
you could have the same layer several times defined with different default
styles, which are called by different users.
I know that users want A their particular styling and B only use the default
style. That rarely works.
Cheers
Christian
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____________________________
Dr Christian Maul
Project Manager
Information Services Branch
Department of Sustainability and Environment
Level13, Marland House, 570 Bourke Street
Melbourne 3000