使用IdentityServer4作为认证服务提供程序，并使用Angular Oauth2 OIDC作为客户端应用程序的身份验证库。这将允许每个客户端应用程序使用独立的登录。

配置IdentityServer4以允许多个客户端应用程序使用相同的身份验证资源。这可以通过在IdentityServer4配置文件中指定多个客户端应用程序进行完成。例如：

 public static IEnumerable Clients =>
     new List
     {
         new Client
         {
             ClientId = "myFirstClient",
             ClientName = "My First Client",
             AllowedGrantTypes = GrantTypes.ClientCredentials,
             ClientSecrets =
             {
                 new Secret("mySecret".Sha256())
             },
             AllowedScopes = { "api1", "api2" }
         },
         new Client
         {
             ClientId = "mySecondClient",
             ClientName = "My Second Client",
             AllowedGrantTypes = GrantTypes.ClientCredentials,
             ClientSecrets =
             {
                 new Secret("mySecret".Sha256())
             },
             AllowedScopes = { "api1", "api3" }
         }
      };

在Angular中，使用Angular Oauth2 OIDC库并使用不同的ClientId来初始化每个客户端应用程序的身份验证服务。例如：

     const myFirstClientConfig = {
       clientId: 'myFirstClient',
       scope: 'openid profile email',
       issuer: 'http://localhost:5000',
       redirectUri: 'http://localhost:4200/callback',
       silentRedirectUri: 'http://localhost:4200/silent-refresh.html',
       tokenEndpoint: 'http://localhost:5000/connect/token',
       userinfoEndpoint: 'http://localhost:5000/connect/userinfo',
       oidc: false,
       showDebugInformation: true
     };
     
     const mySecondClientConfig = {
       clientId: 'mySecondClient',
       scope: 'openid profile email',
       issuer: 'http://localhost:5000',
       redirectUri: 'http://localhost:4200