Hi,

you can achieve this kind of config using record rules for specific user group.

For ex.

one rule for Group : "Sales / See Own Leads" on model ir.attachment.

Domain is : [('res_model','=','sale.order')]

According to rule user of above group can only read, write, create and unlink(delete) attachments of sale.order model. Except sale.order model (any other model) user can not read, write, create and unling attachments.

I hope ex is clear enough.

Thanks.

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