Right now it's impossible to alter the list of conditions available for an asset injector. This list could grow very fast on complex projects that actively use condition plugins for other purposes.
The module could use the filtered plugin manager API already implemented by the condition plugin manager. This allows other modules to alter the list of plugins through the following core hooks:
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Needs review
2.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
I agree this request totally makes sense, even if it's more or less an edge-case. What do the maintainers think? @pookmish @GeekMerlin?
@Dmitriy.trt could you eventually provide a test or check if this is already covered by an existing test to ensure this works as expected and convince the maintainers this can be committed without risks?