public static class RegistrationBuilderExtensions
{
    public static IRegistrationBuilder<TLimit,TActivatorData,TRegistrationStyle> InstancePerMatchingOrRootLifetimeScope<TLimit,TRegistrationStyle>(this IRegistrationBuilder<TLimit,TRegistrationStyle> builder,params object[] lifetimeScopeTag)
    {
        if (lifetimeScopeTag == null) throw new ArgumentNullException("lifetimeScopeTag");
        builder.RegistrationData.Sharing = InstanceSharing.Shared;
        builder.RegistrationData.Lifetime = new MatchingScopeOrRootLifetime(lifetimeScopeTag);
        return builder;
    }
}
 
public class MatchingScopeOrRootLifetime: IComponentLifetime
{
    readonly object[] _tagsToMatch;
 
    public MatchingScopeOrRootLifetime(params object[] lifetimeScopeTagsToMatch)
    {
        if (lifetimeScopeTagsToMatch == null) throw new ArgumentNullException("lifetimeScopeTagsToMatch");
 
        _tagsToMatch = lifetimeScopeTagsToMatch;
    }
 
    public ISharingLifetimeScope FindScope(ISharingLifetimeScope mostNestedVisibleScope)
    {
        if (mostNestedVisibleScope == null) throw new ArgumentNullException("mostNestedVisibleScope");
 
        var next = mostNestedVisibleScope;
        while (next != null)
        {
            if (_tagsToMatch.Contains(next.Tag))
                return next;
 
            next = next.ParentLifetimeScope;
        }
 
        return mostNestedVisibleScope.RootLifetimeScope;
    }
}

只需将这些类添加到项目中,并将组件注册为：

builder.RegisterType<A>.InstancePerMatchingOrRootLifetimeScope("TAG");

我自己没试过,但它应该有用.